Bibliografie tematiche / Coordination chemitry

Letteratura scientifica selezionata sul tema "Coordination chemitry"

Autore: Grafiati
Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Coordination chemitry":

1

Salzer, A. "Nomenclature of Organometallic Compounds of the Transition Elements (IUPAC Recommendations 1999)". Pure and Applied Chemistry 71, n. 8 (30 agosto 1999): 1557–85. http://dx.doi.org/10.1351/pac199971081557.

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Organometallic compounds are defined as containing at least one metal-carbon bond between an organic molecule, ion, or radical and a metal. Organometallic nomenclature therefore usually combines the nomenclature of organic chemisty and that of coordination chemistry. Provisional rules outlining nomenclature for such compounds are found both in Nomenclature of Organic Chemistry, 1979 and in Nomenclature of Inorganic Chemistry, 1990This document describes the nomenclature for organometallic compounds of the transition elements, that is compounds with metal-carbon single bonds, metal-carbon multiple bonds as well as complexes with unsaturated molecules (metal-p-complexes).Organometallic compounds are considered to be produced by addition reactions and so they are named on an addition principle. The name therefore is built around the central metal atom name. Organic ligand names are derived according to the rules of organic chemistry with appropriate endings to indicate the different bonding modes. To designate the points of attachment of ligands in more complicated structures, the h, k, and m-notations are used. The final section deals with the abbreviated nomenclature for metallocenes and their derivatives.ContentsIntroduction Systems of Nomenclature2.1 Binary type nomenclature 2.2 Substitutive nomenlcature 2.3 Coordination nomenclature Coordination Nomenclature3.1 General definitions of coordination chemistry 3.2 Oxidation numbers and net charges 3.3 Formulae and names for coordination compounds Nomenclature for Organometallic Compounds of Transition Metals 4.1 Valence-electron-numbers and the 18-valence-electron-rule 4.2 Ligand names 4.2.1 Ligands coordinating by one metal-carbon single bond 4.2.2 Ligands coordinating by several metal-carbon single bonds 4.2.3 Ligands coordinating by metal-carbon multiple bonds 4.2.4 Complexes with unsaturated molecules or groups 4.3 Metallocene nomenclature
2

Wenger, Marc, e Thomas Armbruster. "Crystal chemistry of lithium: oxygen coordination and bonding". European Journal of Mineralogy 3, n. 2 (18 aprile 1991): 387–400. http://dx.doi.org/10.1127/ejm/3/2/0387.

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3

Porras Gutiérrez, Ana Gabriela, Joceline Zeitouny, Antoine Gomila, Bénédicte Douziech, Nathalie Cosquer, Françoise Conan, Olivia Reinaud et al. "Insights into water coordination associated with the CuII/CuI electron transfer at a biomimetic Cu centre". Dalton Trans. 43, n. 17 (2014): 6436–45. http://dx.doi.org/10.1039/c3dt53548g.

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4

Hindson, Karen. "Coordination Chemistry". European Journal of Inorganic Chemistry 2012, n. 29 (ottobre 2012): 4519. http://dx.doi.org/10.1002/ejic.201290090.

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5

Delanoue, Renald, e Nuria M. Romero. "Growth and Maturation in Development: A Fly’s Perspective". International Journal of Molecular Sciences 21, n. 4 (13 febbraio 2020): 1260. http://dx.doi.org/10.3390/ijms21041260.

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In mammals like humans, adult fitness is improved due to resource allocation, investing energy in the developmental growth process during the juvenile period, and in reproduction at the adult stage. Therefore, the attainment of their target body height/size co-occurs with the acquisition of maturation, implying a need for coordination between mechanisms that regulate organismal growth and maturation timing. Insects like Drosophila melanogaster also define their adult body size by the end of the juvenile larval period. Recent studies in the fly have shown evolutionary conservation of the regulatory pathways controlling growth and maturation, suggesting the existence of common coordinator mechanisms between them. In this review, we will present an overview of the significant advancements in the coordination mechanisms ensuring developmental robustness in Drosophila. We will include (i) the characterization of feedback mechanisms between maturation and growth hormones, (ii) the recognition of a relaxin-like peptide Dilp8 as a central processor coordinating juvenile regeneration and time of maturation, and (iii) the identification of a novel coordinator mechanism involving the AstA/KISS system.
6

Krezel, A., e W. Bal. "Coordination chemistry of glutathione." Acta Biochimica Polonica 46, n. 3 (30 settembre 1999): 567–80. http://dx.doi.org/10.18388/abp.1999_4129.

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The metal ion coordination abilities of reduced and oxidized glutathione are reviewed. Reduced glutathione (GSH) is a very versatile ligand, forming stable complexes with both hard and soft metal ions. Several general binding modes of GSH are described. Soft metal ions coordinate exclusively or primarily through thiol sulfur. Hard ones prefer the amino acid-like moiety of the glutamic acid residue. Several transition metal ions can additionally coordinate to the peptide nitrogen of the gamma-Glu-Cys bond. Oxidized glutathione lacks the thiol function. Nevertheless, it proves to be a surprisingly efficient ligand for a range of metal ions, coordinating them primarily through the donors of the glutamic acid residue.
7

Herberhold, Max, e Anthony F. Hill. "The coordination chemistry of iminooxosulphuranes VII. Coordinative activation of tolyliminooxosulphurane towards electrophiles". Journal of Organometallic Chemistry 395, n. 2 (settembre 1990): 207–18. http://dx.doi.org/10.1016/0022-328x(90)85278-7.

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8

Zheng, Heping, Mahendra Chordia, David Cooper, Ivan Shabalin, Maksymilian Chruszcz, Peter Müller, George Sheldrick e Wladek Minor. "Check your metal - not every density blob is a water molecule". Acta Crystallographica Section A Foundations and Advances 70, a1 (5 agosto 2014): C1483. http://dx.doi.org/10.1107/s2053273314085167.

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Metals play vital roles in both the mechanism and architecture of biological macromolecules, and are the most frequently encountered ligands (i.e. non-solvent heterogeneous chemical atoms) in the determination of macromolecular crystal structures. However, metal coordinating environments in protein structures are not always easy to check in routine validation procedures, resulting in an abundance of misidentified and/or suboptimally modeled metal ions in the Protein Data Bank (PDB). We present a solution to identify these problems in three distinct yet related aspects: (1) coordination chemistry; (2) agreement of experimental B-factors and occupancy; and (3) the composition and motif of the metal binding environment. Due to additional strain introduced by macromolecular backbones, the patterns of coordination of metal binding sites in metal-containing macromolecules are more complex and diverse than those found in inorganic or organometallic chemistry. These complications make a comprehensive library of "permitted" coordination chemistry in protein structures less feasible, and the usage of global parameters such as the bond valence method more practical, in the determination and validation of metal binding environments. Although they are relatively infrequent, there are also cases where the experimental B-factor or occupancy of a metal ion suggests careful examination. We have developed a web-based tool called CheckMyMetal [1](http://csgid.org/csgid/metal_sites/) for the quick validation of metal binding sites. Moreover, the acquired knowledge of the composition and spatial arrangement (motif) of the coordinating atoms around the metal ion may also help in the modeling of metal binding sites in macromolecular structures. All of the studies described herein were performed using the NEIGHBORHOOD SQL database [2], which connects information about all modeled non-solvent heterogeneous chemical motifs in PDB structure by vectors describing all contacts to neighboring residues and atoms. NEIGHBORHOOD has broad applications for the validation and data mining of ligand binding environments in the PDB.
9

Taakili, Rachid, e Yves Canac. "NHC Core Pincer Ligands Exhibiting Two Anionic Coordinating Extremities". Molecules 25, n. 9 (9 maggio 2020): 2231. http://dx.doi.org/10.3390/molecules25092231.

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The chemistry of NHC core pincer ligands of LX2 type bearing two pending arms, identical or not, whose coordinating center is anionic in nature, is here reviewed. In this family, the negative charge of the coordinating atoms can be brought either by a carbon atom via a phosphonium ylide (R3P+–CR2−) or by a heteroatom through amide (R2N−), oxide (RO−), or thio(seleno)oxide (RS−, RSe−) donor functionalities. Through selected examples, the synthetic methods, coordination properties, and applications of such tridentate systems are described. Particular emphasis is placed on the role of the donor ends in the chemical behavior of these species.
10

Lusby, Paul J. "Supramolecular coordination chemistry". Annual Reports Section "A" (Inorganic Chemistry) 108 (2012): 292. http://dx.doi.org/10.1039/c2ic90030k.

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Ti possono interessare anche gli elenchi estesi di opere sul tema "Coordination chemitry":
Articoli di riviste Tesi Libri

Tesi sul tema "Coordination chemitry":

1

Hussein, Hiba. "Synthèses de nouveaux ligands carbènes à structures N-hétérocycliques et macro-N-Bis-hétérocycliques symétriques et dissymétriques. Études de leurs propriétés photophysiques, biologiques et de coordination". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0014.

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L'objectif de ce travail de thèse consiste à préparer de nouvelles molécules photosensibles de type carbènes N-hétérocycliques, ligands ou complexes, dessinées pour répondre aux critères des photosensibilisateurs (PS) (molécules pures, hydrosolubles, biocompatibles, non toxiques, d'efficacité d'absorbance maximale, possédant de bonnes propriétés photophysiques) applicables dans le domaine des matériaux ou/et dans le domaine biomédical tel qu'en photothérapie. L'ambition étant d'optimiser les propriétés spectroscopiques des photosensibilisateurs et d'obtenir une bonne photoactivité. Ce travail de thèse décrit dans un premier chapitre un état de l'art non exhaustif concernant les macrocycles hétérocycliques, les carbènes N-hétérocycliques (NHC) et les macrocycles de type NHC ainsi qu'un rappel des propriétés attendues des molécules photosensibles. Dans un deuxième chapitre, il détaille les synthèses de ligands originaux N-hétérocycliques et N-bis-hétérocycliques bis-imidazolium de structures ouvertes ou macrocycliques fermées ainsi que leurs caractérisations physico-chimiques (infrarouge, RMN, spectroscopie de masse). Des structures cristallographiques de certains de ces macrocycles ont été obtenues par diffraction des rayons X. Dans un troisième et dernier chapitre, sont détaillés les différents essais de formation des carbènes et l'étude de leurs propriétés de complexation vis-à-vis des métaux de transition. Des calculs théoriques Gaussian viennent en appui de celle-ci. Une étude par fluorescence et par production d'oxygène singulet ainsi qu'une évaluation des propriétés biologiques des macrocycles et ligands flexibles présentés précédemment, montrent des propriétés photophysiques et biologiques prometteuses. De plus, une étude préliminaire intéressante de l'échange proton/deutérium des protons carbèniques des macrocycles bis-imidazolium est décrite
The objective of this thesis is to prepare new photosensitive molecules of N-heterocyclic carbenes, ligands or complexes, designed to meet the criteria of photosensitizers (PS) (pure, water-soluble, biocompatible, non-toxic molecules, with maximum absorbance efficiency, possessing good photophysical properties) applicable in the field of materials and/or in the biomedical field such as phototherapy. The ambition is to optimise the spectroscopic properties of the photosensitisers and to obtain a good photoactivity. This thesis describes in a first chapter a non-exhaustive state of the art concerning heterocyclic macrocycles, N-heterocyclic carbenes (NHC) and NHC macrocycles as well as a reminder of the expected properties of photosensitive molecules. In a second chapter, it details the syntheses of original N-heterocyclic and N-bis-heterocyclic bis-imidazolium ligands of open or closed macrocyclic structures as well as their physicochemical characterizations (infrared, NMR, mass spectroscopy). Crystallographic structures of some of these macrocycles were obtained by X-ray diffraction. In a third and final chapter, the various tests for the formation of carbenes and the study of their complexation properties towards transition metals are detailed. Theoretical Gaussian calculations are used to support this study. A fluorescence and singlet oxygen production study as well as an evaluation of the biological properties of the previously presented flexible macrocycles and ligands show promising photophysical and biological properties. In addition, an interesting preliminary study of the proton/deuterium exchange of carbon protons of bis-imidazolium macrocycles is described.Keywords: NHC, macrocyclic ligands, bipyridine, bithiazole, imidazolium, photosensitiser, photoactivity, anti-bacterial properties
2

Weis, Philippe [Verfasser], e Ingo [Akademischer Betreuer] Krossing. "Exploring the chemistry of group 15/16 cages with weakly coordinating aluminates – synthesis and coordination chemistry of inorganic cages". Freiburg : Universität, 2019. http://d-nb.info/119056100X/34.

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3

Noack, Cassandra, e n/a. "Studies in Coordination Chemistry". Griffith University. School of Science, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20031030.145610.

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The research reported in this thesis was carried out in Brisbane, Australia and Calgary, Canada. The aim of the research conducted in Brisbane was to prepare a series of copper(I) and ruthenium(II) based complexes incorporating a hemilabile phosphine ligand and to determine whether or not these compounds possessed catalytic activity. The history, uses, properties and recent work incorporating hemilabile phosphine ligands is discussed in detail as well as the application of hemilabile ligands to atom transfer radical polymerization (ATRP) and the usefulness of the 'windscreen wiper' action of these ligands in polymerization. The literature synthesis and characterization of four hemilabile phosphine ligands is reported with modifications. The (2-chlorophenyl)diphenylphosphine ligand was prepared via a Grignard reaction giving a 11% yield. The (2-bromophenyl) diphenylphosphine ligand was prepared by reaction of 2-bromoiodobenzene with Ph2PSiMe3 in the presence of a palladium catalyst (MeCN)2PdCl2 which yielded 50% product. The 1-chloro-2-diphenylphosphinoethane ligand was prepared following the generation of a lithium diphenylphosphide which was added to 1,2-dichloroethane to give a 43% yield of product. The (2-benzoic-acid)diphenylphosphine ligand was prepared by hydrolysis of (2-methyl-ester-phenyl)diphenylphosphine. Following acidification of the methyl ester phosphine with HCl, the desired product was isolated in 88% yield. The synthesis and characterization of a series of copper(I) based complexes incorporating the prepared phosphine ligands involved reaction in CH3CN of the appropriate ligand with copper halides as starting material. Solution state 31P NMR and mass spectrometry were used to study many of these complexes in the solution state, whilst microanalysis, 31P CP MAS NMR and single crystal X-ray diffraction studies were used to study their solid state properties. The complexes of the type bis(2-halophenyl)diphenylphosphine copper halide were found to be three coordinate with non-chelating ligands and to be isostructural with the previously studied bis(2-methylphenyl)diphenylphosphine copper halide complexes. The synthesis and characterization of ruthenium(II) based complexes incorporating hemilabile phosphine ligands involved reaction of the appropriate ligands in MeOH with RuCl3.3H2O or RuCl2(DMSO)4 as the ruthenium source. Modes of characterization included solution state 31P NMR, mass spectrometry, microanalysis and single crystal X-ray diffraction studies. All ruthenium(II) based complexes were found to incorporate the hemilabile ligands in a chelating mode resulting in 6 coordinate structures. The preliminary polymerization testing of MMA in the presence of the copper(I) and ruthenium(II) based complexes has been reported. All complexes successfully polymerized the monomer and the resulting polyMMA showed polydispersity values ranging from moderate (3.1) to very high (6.7). Chapter 7 discusses research conducted over a 6 month period at the University of Calgary, Canada under an International Resident Fellowship award. This work involved the synthesis and characterization of scandium(III) and yttrium(III) based complexes incorporating a chelating amido-imine ligand, as potential olefin polymerization catalysts.
4

Noack, Cassandra. "Studies in Coordination Chemistry". Thesis, Griffith University, 2003. http://hdl.handle.net/10072/366798.

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Abstract (sommario):
The research reported in this thesis was carried out in Brisbane, Australia and Calgary, Canada. The aim of the research conducted in Brisbane was to prepare a series of copper(I) and ruthenium(II) based complexes incorporating a hemilabile phosphine ligand and to determine whether or not these compounds possessed catalytic activity. The history, uses, properties and recent work incorporating hemilabile phosphine ligands is discussed in detail as well as the application of hemilabile ligands to atom transfer radical polymerization (ATRP) and the usefulness of the 'windscreen wiper' action of these ligands in polymerization. The literature synthesis and characterization of four hemilabile phosphine ligands is reported with modifications. The (2-chlorophenyl)diphenylphosphine ligand was prepared via a Grignard reaction giving a 11% yield. The (2-bromophenyl) diphenylphosphine ligand was prepared by reaction of 2-bromoiodobenzene with Ph2PSiMe3 in the presence of a palladium catalyst (MeCN)2PdCl2 which yielded 50% product. The 1-chloro-2-diphenylphosphinoethane ligand was prepared following the generation of a lithium diphenylphosphide which was added to 1,2-dichloroethane to give a 43% yield of product. The (2-benzoic-acid)diphenylphosphine ligand was prepared by hydrolysis of (2-methyl-ester-phenyl)diphenylphosphine. Following acidification of the methyl ester phosphine with HCl, the desired product was isolated in 88% yield. The synthesis and characterization of a series of copper(I) based complexes incorporating the prepared phosphine ligands involved reaction in CH3CN of the appropriate ligand with copper halides as starting material. Solution state 31P NMR and mass spectrometry were used to study many of these complexes in the solution state, whilst microanalysis, 31P CP MAS NMR and single crystal X-ray diffraction studies were used to study their solid state properties. The complexes of the type bis(2-halophenyl)diphenylphosphine copper halide were found to be three coordinate with non-chelating ligands and to be isostructural with the previously studied bis(2-methylphenyl)diphenylphosphine copper halide complexes. The synthesis and characterization of ruthenium(II) based complexes incorporating hemilabile phosphine ligands involved reaction of the appropriate ligands in MeOH with RuCl3.3H2O or RuCl2(DMSO)4 as the ruthenium source. Modes of characterization included solution state 31P NMR, mass spectrometry, microanalysis and single crystal X-ray diffraction studies. All ruthenium(II) based complexes were found to incorporate the hemilabile ligands in a chelating mode resulting in 6 coordinate structures. The preliminary polymerization testing of MMA in the presence of the copper(I) and ruthenium(II) based complexes has been reported. All complexes successfully polymerized the monomer and the resulting polyMMA showed polydispersity values ranging from moderate (3.1) to very high (6.7). Chapter 7 discusses research conducted over a 6 month period at the University of Calgary, Canada under an International Resident Fellowship award. This work involved the synthesis and characterization of scandium(III) and yttrium(III) based complexes incorporating a chelating amido-imine ligand, as potential olefin polymerization catalysts.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Science
Faculty of Science
Full Text
5

Keene, Frank Richard. "Aspects of coordination chemistry /". Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09SD/09sdk26.pdf.

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6

Higginson, Joshua J. "Synthesis and coordination chemistry of ditopic ligands capable of coordinating metal ions and interacting with anions". Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/26444/.

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The aim of this research was to synthesise a series of novel organic multidentate ligands which contain N-donor domains for the coordination of metal ions and amide or amine hydrogen atoms which are capable of interaction with anions. It was envisaged that incorporation of these two binding units would produce a system where the metal ions would control the ability of the ligand to interact with anions or vice versa. Ligand 1 contains a tetradentate N-donor domain formed by a central bipyridine, two thaizole units and two amide units attached in the 4,4’-position of the bipyridine unit. Reaction of this with divalent metal ions results in a mono-nuclear complex where the metal is bound by the N-donor atoms and the amides interact with a variety of anions. Reaction with monovalent metal ions results in the formation of a dinuclear double helicate with the metal again coordinated by the N-donor domains and the anions interacting with the amide hydrogen atoms. This results in a polymeric assembly in the solid state. Ligand 2 contains an identical tetradentate domain comprised of the same N-donor units; however the single amides in the 4,4’-position have been removed and a diamide attached in the 3,3’-position of the bipyridine unit. Reaction of [L2 with divalent cations results in a similar mono-nuclear species. The metal centre is coordinated by the N-donor atoms and one of the acetyl units from two adjoining ligands with the counter ions undergoing interactions with the diamide hydrogen atoms. Coordination of the same ligand with a monovalent cation resulted in a di-nuclear double helicate, each metal centre is fulfilled by the N-donor atoms of the ligand strand and the hydrogen atoms of the diamide units interact with anions. This too results in a polymeric assembly in the solid state. Ligands 3 and 4 contain the iso-structural tetradentate N-donor domain seen in [L1] and [L2] but their functionality in the 3,3’-position differ. Ligand 3 contains a urea group while ligand 4 has a single amide group attatched to an indole unit. Coordination of [L3] and a divalent metal ion results in the formation of a mono-nuclear species with the metal ion bound by the central bipyridine and the N-donor of two thaizole units. Furthermore each of the urea groups in the 3,3’-position undergo favourable interactions with the perchlorate counter ions. A solid state structure of Ligand 4 was only successful with a monovalent cation resulting in the formation of a dinuclear double stranded species. Each metal centre exhibits a distorted trigonal planar geometry through coordination with a pyridine and thiazole ring of one strand and a single thiazole ring of another. The indole and amide of each ligand strand undergo two sets of interactions; anion interactions through the amide and indole hydrogen atoms as well as complementary intermolecular interactions between the indole N···H units of one ligand and the carbonyl C···O units of another complex. Both [L3] and [L4] exhibit long range order through favourable anion-NH interactions however [L4] also displays complimentary indole/acetyl interactions to develop a larger aggregate species. In all these cases the resultant complex is independent upon which anion is used. However, this is not the case with ligand 5. Reaction of [L5] with Cu(BF4)2 or Cu(ClO4)2 gave a dinuclear double helicate with a cleft within the helicate assembly in which an anion is bound. However, reaction of this with half an equivalent of either sulphate (SO4 2-) or dihydrogen phosphate (H2PO4 -) results in the formation of a different dinuclear double helicate whereby the cleft is occupied by either a dihydrogen phosphate or sulphate anion which bridges the metal centres. Further addition of sulphate results in no change of the ESI-MS indicating the dinuclear double helicate persist however addition of one equivalent of di-hydrogen phosphate leads to the formation of a pentanuclear circular helicate. Each metal centre is coordinated by the pyridine and thiazole units of two different ligand strands and a single Cu···O interaction from one of the dihydrogen phosphates. The inclusion of three dihydrogen phosphates into the centre of the assembly as well as a series of phosphate-ligand and phosphate-phosphate interactions leads to the dimerization of the structure with another set of phosphates from a second assembly. Further reaction of this dinuclear species with one equivalent of (Bu4N)NO3 resulted in the formation of a hexanuclear circular meso-helicate (or mesocate). In this structure each Ndonor domain of a thiazole and pyridine ring coordinate two different Cu2+ metal centres. Each metal centre exhibits a distorted octahedral arrangement with two ligand strands completing 4 of its 6 coordination sites, the remaining sites are occupied by two O-donors of a nitrate anion. In addition an amine of each ligand strand points into the centre of the complex creating a cavity capable of hosting two nitrate anions. Ligand 6 is made up of the same bis-bidentate donors as ligand 5 with the addition of a nitrogen atom into the central phenyl spacer. On reaction of [L6] with a divalent metal ion (e.g. Cu(II)) a simple mono-nuclear structure is observed. Although a mono-nuclear assembly is expected, it is interesting that even a simple change in the ligand strand can have a dramatic affect on the self-assembly process. When a central 1,3-phenylene spacer is employed (i.e. [L5]) a dinuclear double helicate is formed, however, when a 1,3-pyridine unit is contained within the ligand strand (i.e. [L6]) a simple mono-nuclear species is produced.
7

Wu, Haiying. "Coordination chemistry of tetraneopentoxyphthalocyaninatocobalt(II)". Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29822.

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The thesis work reports developments in the coordination chemistry of tetra-neopentoxyphthalocyaninatocobalt(II) (CoTNPc) complexes. The preparation, characterization, and ligand binding measurements in solution of seven new compounds are described in this thesis. Some additional complexes are studied in situ. Measurement of the equilibrium constants by UV-visible spectroscopy for the 1:1 binding reactions of the axial ligands (L = imidazole, N-methylimidazole, pyridine, 4-picoline, 4-tert-butylpyridine, piperidine, tetrahydrofuran) to CoTNPc in toluene solution allow for an estimation of the enthalpies for the binding of the N-donor ligands (7 - 12 kcal/mol) and the O-donor ligand (~ 4 kcal/mol). The order of equilibrium constants for ligand binding at room temperature is found to be: N-MeIm > pip > 4-[formula omitted]Bupy > Im > py > THF. Seven five-coordinate CoTNPc species have been isolated (L = N-MeIm, py, 4-pic, 4-[formula omitted]Bupy, pip, THF, DMSO) and characterized by elemental analyses, and UV-visible, MS (FAB), and NMR spectroscopy. The magnetic moment of CoTNPc in the solid state is found to be 2.23 ± 0.10 B.M. at ambient temperature, while the magnetic moment is 2.47 ± 0.10 B.M. in toluene solution. The magnetic moment of the five-coordinate species (py)CoTNPc is 2.61 ± 0.10 B.M. in toluene solution. It is concluded that CoTNPc and the five-coordinate complex (py)CoTNPc at room temperature are low spin with one unpaired electron. The ¹H NMR spectra of the paramagnetic species (CoTNPc, LCoTNPc, L = Im, N-MeIm, py, 4-pic, 4-[formula omitted]Bupy, pip, THF, PPh₃) are studied. The ¹H NMR spectra of CoTNPc are found to be solvent dependent; the α- and β-proton signals of the phthalocyanine ring are very broad in DMSO-d₆ and benzene-d₆, and in chloroform-d₁ these signals are so broad that they could not be observed. Some irregular multiplicities in these proton NMR spectra result from the cobalt(II) complexes being mixtures of isomers. The isotropic shift vs.l/T Curie plot for (py)CoTNPc shows that the extrapolated isotropic shifts of the benzo-, methylene, and methyl protons on the phthalocyanine ring at infinite temperature are not zero, indicating there is a contribution from a dipolar interaction. For the axial ligands, the proton signals of the methyl groups of some ligands (L = N-MeIm, 4-pic, 4-[formula omitted]Bupy) are observed, and these signals are averaged by rapid chemical exchange between the free and coordinated ligands; the ligand aromatic proton signals of these ligands are not observed. However, the ²H NMR spectra, when L = pyridine-d₆, show that the ϒ-²H signal shifts in a direction different to signals from the α- and β-²H deuterons, suggesting a contact shift mechanism is dominant in this case. The ³¹P NMR spectra of in situ PPh₃/CoTNPc samples do not give any peaks, indicating that signals for the phosphine are extremely broad. The elemental analyses, UV-visible spectra, IR, NMR, and ESR results suggest that CoTNPc and its five-coordinate species do not bind oxygen at the temperatures examined (77 K to ambient temperature).
Science, Faculty of
Chemistry, Department of
Graduate
8

Moore, Charles H. M. "Coordination chemistry of guanidine derivatives". Thesis, University of Nottingham, 1987. http://eprints.nottingham.ac.uk/14354/.

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This thesis describes an investigation of the coordination chemistry of l-cyanoguanidine (cnge), l-carbamoylguanidine (clge) and l-amidino-O-ethylurea (aOeu). Various copper(II) complexes of these analogous molecules were synthesised and characterised using mainly X-ray crystallographic and spectroscopic (infrared and UV-visible) techniques. Only bis (cnge) complexes were observed for copper(II) ions. The monodentate cnge ligands coordinated the copper(II) via their nitrile nitrogen atoms which were located in trans equatorial positions of the copper(II) ions's tetragonally distorted octahedral coordination sphere. Comparison of the infrared spectra of the complexes with that of cnge indicated that the spectra were highly diagnostic of coordination to the copper(II) ion. Clge exhibited amphoteric properties; the neutral, anionic and cationic derivatives formed complexes with the copper(II) ion. Whereas the former pair gave bis chelate complexes, the latter derivatives acted merely as a cation and was remote from the copper(II) ion's coordination sphere. Complexation of the neutral molecule resulted in a proton transfer from a terminal amine group to a central nitrogen atom permitting chelation via an imine nitrogen atom and a carbonyl oxygen atom to give a square planar CUN2O2 chromophore. The structural ramifications of this tautomeric shift were near identical to those observed upon cation formation which occurred by protonation of the central nitrogen atom of the uncoordinated neutral molecule. Unequivocal structural data could not be obtained for the complex of the anionic derivative. Spectroscopic analysis indicated, however, that chelation occurred via two imine nitrogen atoms to give a square planar CuN4 chromophore. Ethanolysis of cnge was effected in the presence of copper(II) ions and ethanol producing complexes of aOeu with a metal:ligand ratio of 1:1 or 1:2. In both complexes the ligand(s) chelated the copper(II) ion via two imine nitrogen atoms. The former complex, a dimer, exhibited a square pyramidal CUN2X3 chromophore (X=Cl,Br) whilst the latter complex was a bis chelate with a square planar CUN4 chromophore. Monitoring the Uv-visible and infrared spectra of ethanol solutions containing copper(II) chloride and cnge, indicated the presence of a plethora of reactions. However, it was concluded that initially mono and/or bis(cnge)copper(II) complexes, of low stability, were present in equilibrium with the reactants. Subsequently, ethanolysis of coordinated cnge occurred producing mono(aOeu)copper(II) complexes. Series first order kinetics approximated to those of the ethanolysis reaction. The ethanolysis process was then repeated to give the final product a bis(cnge)copper(II) complex.
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Grundy, Joanna. "Bifunctional amidines in coordination chemistry". Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398786.

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Mansfield, Natalie Emma. "Phosphaguanidines : coordination chemistry and catalysis". Thesis, University of Sussex, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435610.

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Libri sul tema "Coordination chemitry":

1

Gispert, Joan Ribas. Coordination chemistry. Weinheim: Wiley-VCH, 2008.

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2

Kauffman, George B., a cura di. Coordination Chemistry. Washington, DC: American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0565.

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3

Basolo, Fred. Coordination chemistry. 2a ed. [England]: Science Reviews, 1986.

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4

W, Alcock N., a cura di. Coordination chemistry. Berlin: Springer-Verlag, 1995.

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1939-, Alcock N. W., a cura di. Coordination chemistry. Berlin: Springer-Verlag, 1995.

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Basolo, Fred. Coordination chemistry. 2a ed. Northwood: Science Reviews, 1986.

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Weber, Birgit. Coordination Chemistry. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4.

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Winterton, Neil, e Jeff Leigh, a cura di. Modern Coordination Chemistry. Cambridge: Royal Society of Chemistry, 2007. http://dx.doi.org/10.1039/9781847551481.

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Bowman-James, Kristin, Antonio Bianchi e Enrique García-España, a cura di. Anion Coordination Chemistry. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527639502.

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Herrmann, W. A., a cura di. Transition Metall Coordination Chemistry. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/3-540-54324-4.

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Capitoli di libri sul tema "Coordination chemitry":

1

Weber, Birgit. "Bioinorganic Chemistry". In Coordination Chemistry, 215–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_12.

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Weber, Birgit. "Supramolecular Coordination Chemistry". In Coordination Chemistry, 121–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_8.

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Comba, Peter, Marion Kerscher e Wolfgang Schiek. "Bispidine Coordination Chemistry". In Progress in Inorganic Chemistry, 613–704. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470144428.ch9.

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Lippard, Stephen J. "Eight-Coordination Chemistry". In Progress in Inorganic Chemistry, 109–93. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470166093.ch3.

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Drew, Michael G. B. "Seven-Coordination Chemistry". In Progress in Inorganic Chemistry, 67–210. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470166246.ch2.

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Weber, Birgit. "Catalysis". In Coordination Chemistry, 239–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_13.

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Weber, Birgit. "What Are Organometallic Compounds?" In Coordination Chemistry, 35–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_3.

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Weber, Birgit. "Color of Coordination Compounds". In Coordination Chemistry, 73–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_5.

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Weber, Birgit. "Structure and Nomenclature". In Coordination Chemistry, 13–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_2.

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Weber, Birgit. "Stability of Coordination Compounds". In Coordination Chemistry, 87–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66441-4_6.

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Atti di convegni sul tema "Coordination chemitry":

1

Kresinski, Roman, Seema Pillai e Peter Foot. "Scorpionates: Coordination Chemistry Comes Home". In Chemical technology and engineering. Lviv Polytechnic National University, 2019. http://dx.doi.org/10.23939/cte2019.01.397.

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2

Guo, Binglin. "Coordination Chemistry of Selenate in Ettringite". In Proceedings of the 18th International Conference on Heavy Metals in the Environment. openjournals ugent, 2016. http://dx.doi.org/10.21825/ichmet.71347.

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Nakazawa, H. "Strong bond cleavage promoted by silyl group migration in a coordination sphere". In SUSTAINABLE CHEMISTRY 2011. Southampton, UK: WIT Press, 2011. http://dx.doi.org/10.2495/chem110121.

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Sakamoto, Ryota. "Coordination Programming of Photo- and Electro- Functional Molecular Assemblies". In Annual International Conference on Chemistry, Chemical Engineering and Chemical Process (CCECP 2014). GSTF, 2014. http://dx.doi.org/10.5176/2301-3761_ccecp14.23.

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Wang, Ruiyao, e Tianhao Yan. "Study of Organolead Halide Perovskite Film Formation Mechanism from the View of Coordination Chemistry". In 2nd Asia-Pacific Hybrid and Organic Photovoltaics. Valencia: Fundació Scito, 2017. http://dx.doi.org/10.29363/nanoge.ap-hopv.2018.032.

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Boissel, P. "Iron aromatics coordination: Ion trap experiments on Fe+(C10H8)n complexation". In The 50th international meeting of physical chemistry: Molecules and grains in space. AIP, 1994. http://dx.doi.org/10.1063/1.46595.

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M, WAFAA. "Coordination Chemistry of Cu II with Polyvinyl alcohol PVA and Some Amino acids and DNA". In Fourth International Conference On Advances in Applied Science and Environmental Engineering - ASEE 2015. Institute of Research Engineers and Doctors, 2015. http://dx.doi.org/10.15224/978-1-63248-068-2-09.

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Petros, Robby A., Duong T. Nguyen, Ronaldo J. Cavazos, Clifford S. Morrison, Jana B. Lampe, Alesha N. Harris e Brian K. McFarlin. "Abstract 4399: Utilizing cobalt coordination chemistry as a traceless prodrug strategy in targeted drug delivery". In Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PA. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/1538-7445.am2015-4399.

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DALL’AGNOL, Letizzia, Alice Medeiros de SOUZA, Lilian Campos AMADEU, Eleni VOSNIADOU e Fernanda Ishida CORRÊA. "TRANSCRANIAL DIRECT STIMULATION IN THE NEUROMODULATION OF CONTROLLING MAIN SYMPTOMS OF PARKINSON’S DISEASE: A CASE STUDY". In SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE. DR. D. SCIENTIFIC CONSULTING, 2022. http://dx.doi.org/10.48141/sbjchem.21scon.06_abstract_ishida.pdf.

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Abstract (sommario):
Parkinson’s disease (PD) is a central nervous system neurodegenerative disorder that primarily affects the motor system, decreasing motor coordination, balance and generating tremors, and a progressive loss of everyday mobility, including walking. This study was conducted to verify the effects of Transcranial Direct Current Stimulation (tDCS) on balance, motor control, and the quality of life in Parkinson’s disease patients. The patient received three treatments consisting of 10 sessions of 20 minutes each and a one-week interval between treatments. Active stimulation was applied on the primary motor cortex (M1), the dorsolateral prefrontal cortex (DLPFC), and the dorsolateral prefrontal cortex (D Sham-tDCS. DLPFC stimulation produced the best improvements in terms of motor control, balance, gait, and overall PD symptoms, as evaluated by different scales and questionnaires. As a result, active stimulation of the DLPFC produced superior outcomes and may contribute to treating Parkinson’s disease.
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Direm, Amani, Olufunso Abosede, Mohammed S. M. Abdelbaky, Cemal Parlak, Santiago García-Granda e Nourredine Benali-Cherif. "A pyrazole-containing copper coordination framework : an investigation into its Hirshfeld surface analysis, magnetic behavior and biological activity". In 5th International Electronic Conference on Medicinal Chemistry. Basel, Switzerland: MDPI, 2019. http://dx.doi.org/10.3390/ecmc2019-06690.

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Rapporti di organizzazioni sul tema "Coordination chemitry":

1

Drake, Greg W., Karl O. Christie, William W. Wilson, M. A. Petrie e R. Z. Gnann. Chemistry at the Limits of Coordination. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1998. http://dx.doi.org/10.21236/ada397980.

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Kelley, Morgan Patrick, Xiaobin Zhang, Jing Su, Ping Yang, Enrique Ricardo Batista, Jason Lee Baker, Artaches Migdissov, Hakim Boukhalfa e Hongwu Xu. AnO2-Cl Coordination Chemistry at High P/T. Office of Scientific and Technical Information (OSTI), gennaio 2019. http://dx.doi.org/10.2172/1493020.

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Lumetta, Gregg J., Jenifer C. Braley, Sergey I. Sinkov e Jennifer C. Carter. Separating the Minor Actinides Through Advances in Selective Coordination Chemistry. Office of Scientific and Technical Information (OSTI), agosto 2012. http://dx.doi.org/10.2172/1094957.

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Hays, James Allen. The coordination and atom transfer chemistry of titanium porphyrin complexes. Office of Scientific and Technical Information (OSTI), novembre 1993. http://dx.doi.org/10.2172/10194736.

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Zubieta, J. The coordination chemistry of technetium and rhenium and applications to nuclear medicine. Final report. Office of Scientific and Technical Information (OSTI), dicembre 1996. http://dx.doi.org/10.2172/763982.

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Schultz, Madeleine. Synthesis and structure of bivalent ytterbocenes and their coordination chemistry with pi-acceptor ligands. Office of Scientific and Technical Information (OSTI), maggio 2000. http://dx.doi.org/10.2172/764392.

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7

Parks, N. J., W. R. Harris, C. L. Keen e S. R. Cooper. Coordination chemistry of the sup 212 Pb/ sup 212 Bi nuclear transformation: Alpha-emitting radiopharmaceuticals. Office of Scientific and Technical Information (OSTI), luglio 1992. http://dx.doi.org/10.2172/7115548.

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Parks, N. J., W. R. Harris, C. L. Keen e S. R. Cooper. Coordination chemistry of the {sup 212}Pb/{sup 212}Bi nuclear transformation: Alpha-emitting radiopharmaceuticals. Final technical report. Office of Scientific and Technical Information (OSTI), luglio 1992. http://dx.doi.org/10.2172/10168019.

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Schutt, Timothy, e Manoj Shukla. Predicting the impact of aqueous ions on fate and transport of munition compounds. Engineer Research and Development Center (U.S.), agosto 2021. http://dx.doi.org/10.21079/11681/41481.

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Abstract (sommario):
A model framework for natural water has been developed using computational chemistry techniques to elucidate the interactions between solvated munition compounds and eight common ions in naturally occurring water sources. The interaction energies, residence times, coordination statistics, and surface preferences of nine munition related compounds with each ion were evaluated. The propensity of these interactions to increase degradation of the munition compound was predicted using accelerated replica QM/MM simulations. The degradation prediction data qualitatively align with previous quantum mechanical studies. The results suggest that primary ions of interest for fate and transport modeling of munition compounds in natural waters may follow the relative importance of SO₄²⁻, Cl⁻ ≫ HCO₃⁻, Na⁺, Mg²⁺ > Ca²⁺, K⁺, and NH₄⁺.
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Zubieta, J. The coordination chemistry of technetium and rhenium and applications to nuclear medicines. [Annual] technical report, April 1, 1993--December 31, 1993. Office of Scientific and Technical Information (OSTI), dicembre 1993. http://dx.doi.org/10.2172/10144275.

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