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Journal articles on the topic 'Coordination Chemistry - Transition Metals'

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Published: 7 September 2023

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1

Salzer, A. "Nomenclature of Organometallic Compounds of the Transition Elements (IUPAC Recommendations 1999)." Pure and Applied Chemistry 71, no. 8 (August 30, 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

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2

Gallen, Albert, Sílvia Orgué, Guillermo Muller, Eduardo C. Escudero-Adán, Antoni Riera, Xavier Verdaguer, and Arnald Grabulosa. "Synthesis and coordination chemistry of enantiopure t-BuMeP(O)H." Dalton Transactions 47, no. 15 (2018): 5366–79. http://dx.doi.org/10.1039/c8dt00897c.

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3

Kubas, Gregory J. "Molecular Hydrogen Coordination to Transition Metals." Comments on Inorganic Chemistry 7, no. 1 (May 1988): 17–40. http://dx.doi.org/10.1080/02603598808072297.

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4

Bobrov, Sergey V., Andrey A. Karasik, and Oleg G. Sinyashin. "Heterocyclic Phosphorus Ligands in Coordination Chemistry of Transition Metals." Phosphorus, Sulfur, and Silicon and the Related Elements 144, no. 1 (January 1, 1999): 289–92. http://dx.doi.org/10.1080/10426509908546238.

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5

Fischer, Roland A., and Jurij Weiß. "Coordination Chemistry of Aluminum, Gallium, and Indium at Transition Metals." Angewandte Chemie International Edition 38, no. 19 (October 4, 1999): 2830–50. http://dx.doi.org/10.1002/(sici)1521-3773(19991004)38:19<2830::aid-anie2830>3.0.co;2-e.

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6

Molter, Anja, Julia Kuchar, and Fabian Mohr. "Acylselenoureas, selenosemicarbazones and selenocarbamate esters: Versatile ligands in coordination chemistry." New Journal of Chemistry 46, no. 10 (2022): 4534–49. http://dx.doi.org/10.1039/d2nj00026a.

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7

Ramler, Jacqueline, and Crispin Lichtenberg. "Bismuth species in the coordination sphere of transition metals: synthesis, bonding, coordination chemistry, and reactivity of molecular complexes." Dalton Transactions 50, no. 21 (2021): 7120–38. http://dx.doi.org/10.1039/d1dt01300a.

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8

Chen, Lizhu, Hunter A. Dulaney, Branford O. Wilkins, Sarah Farmer, Yanbing Zhang, Frank R. Fronczek, and Jonah W. Jurss. "High-spin enforcement in first-row metal complexes of a constrained polyaromatic ligand: synthesis, structure, and properties." New Journal of Chemistry 42, no. 23 (2018): 18667–77. http://dx.doi.org/10.1039/c8nj02072h.

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9

Kawamura, Airi, Alexander S. Filatov, and John S. Anderson. "Sulfonate-Ligated Coordination Polymers Incorporating Paramagnetic Transition Metals." European Journal of Inorganic Chemistry 2019, no. 21 (May 27, 2019): 2613–17. http://dx.doi.org/10.1002/ejic.201900285.

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10

Pringouri, Konstantina, Muhammad U. Anwar, Liz Mansour, Nathan Doupnik, Yassine Beldjoudi, Emma L. Gavey, Melanie Pilkington, and Jeremy M. Rawson. "A novel bis-1,2,4-benzothiadiazine pincer ligand: synthesis, characterization and first row transition metal complexes." Dalton Transactions 47, no. 44 (2018): 15725–36. http://dx.doi.org/10.1039/c8dt03346c.

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11

MEHROTRA, R. C., and A. SINGH. "ChemInform Abstract: Alkoxy Chemistry of Transition Metals. Links with Coordination and Organometallic Chemistry." ChemInform 22, no. 32 (August 22, 2010): no. http://dx.doi.org/10.1002/chin.199132281.

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12

Wallis, Christopher, Peter G. Edwards, Martin Hanton, Paul D. Newman, Andreas Stasch, Cameron Jones, and Robert P. Tooze. "Coordination chemistry of 2,6-dixylyl-4-phenylphosphabarrelene with selected transition metals." Dalton Transactions, no. 12 (2009): 2170. http://dx.doi.org/10.1039/b816499a.

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13

David Smith, J. "Comprehensive Coordination Chemistry, Volume 3, Main Group and Early Transition Metals." Journal of Organometallic Chemistry 356, no. 2 (November 1988): C70—C71. http://dx.doi.org/10.1016/0022-328x(88)83106-1.

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14

Costabile, Chiara, Stefania Pragliola, and Fabia Grisi. "C2-Symmetric N-Heterocyclic Carbenes in Asymmetric Transition-Metal Catalysis." Symmetry 14, no. 8 (August 5, 2022): 1615. http://dx.doi.org/10.3390/sym14081615.

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The last decades have witnessed a rapid growth of applications of N-heterocyclic carbenes (NHCs) in different chemistry fields. Due to their unique steric and electronic properties, NHCs have become a powerful tool in coordination chemistry, allowing the preparation of stable metal-ligand frameworks with both main group metals and transition metals. An overview on the use of five membered monodentate C2-symmetric N-heterocyclic carbenes (NHCs) as ligands for transition-metal complexes and their most relevant applications in asymmetric catalysis is offered.

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15

Beldon, Patrick J., Sebastian Henke, Bartomeu Monserrat, Satoshi Tominaka, Norbert Stock, and Anthony K. Cheetham. "Transition metal coordination complexes of chrysazin." CrystEngComm 18, no. 27 (2016): 5121–29. http://dx.doi.org/10.1039/c5ce00792e.

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Eleven novel coordination compounds, composed of chrysazin (1,8-dihydroxyanthraquinone) and different first-row transition metals (Fe, Co, Ni, Cu), were synthesised and the structures determined by single-crystal X-ray diffraction.

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16

Santos, Ariana C. F., Luís P. G. Monteiro, Adriana C. C. Gomes, Fátima Martel, Teresa M. Santos, and Bárbara J. M. Leite Ferreira. "NSAID-Based Coordination Compounds for Biomedical Applications: Recent Advances and Developments." International Journal of Molecular Sciences 23, no. 5 (March 5, 2022): 2855. http://dx.doi.org/10.3390/ijms23052855.

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After the serendipitous discovery of cisplatin, a platinum-based drug with chemotherapeutic effects, an incredible amount of research in the area of coordination chemistry has been produced. Other transition metal compounds were studied, and several new relevant metallodrugs have been synthetized in the past few years. This review is focused on coordination compounds with first-row transition metals, namely, copper, cobalt, nickel or manganese, or with zinc, which have potential or effective pharmacological properties. It is known that metal complexes, once bound to organic drugs, can enhance the drugs’ biological activities, such as anticancer, antimicrobial or anti-inflammatory ones. NSAIDs are a class of compounds with anti-inflammatory properties used to treat pain or fever. NSAIDs’ properties can be strongly improved when included in complexes using their compositional N and O donor atoms, which facilitate their coordination to metal ions. This review focuses on the research on this topic and on the promising or effective results that complexes of first-row transition metals and NSAIDs can exhibit.

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17

Izakovich, E. N., and M. L. Khidekel'. "Coordination Compounds of Transition Metals in the Chemistry of Aromatic Nitro-compounds." Russian Chemical Reviews 57, no. 5 (May 31, 1988): 419–32. http://dx.doi.org/10.1070/rc1988v057n05abeh003360.

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18

Fischer, Roland A., and Jurij Weiss. "ChemInform Abstract: Coordination Chemistry of Aluminum, Gallium, and Indium at Transition Metals." ChemInform 31, no. 1 (June 12, 2010): no. http://dx.doi.org/10.1002/chin.200001261.

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19

Benesperi, Iacopo, Reena Singh, and Marina Freitag. "Copper Coordination Complexes for Energy-Relevant Applications." Energies 13, no. 9 (May 2, 2020): 2198. http://dx.doi.org/10.3390/en13092198.

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Copper coordination complexes have emerged as a group of transition metal complexes that play important roles in solar energy conversion, utilization and storage, and have the potential to replace the quintessential commonly used transition metals, like Co, Pt, Ir and Ru as light sensitizers, redox mediators, electron donors and catalytic centers. The applications of copper coordination compounds in chemistry and energy related technologies are many and demonstrate their rightful place as sustainable, low toxicity and Earth-abundant alternative materials. In this perspective we show the most recent impact made by copper coordination complexes in dye-sensitized solar cells and other energy relevant applications.

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20

Bohle, D. Scott, Chen-Hsiung Hung, and Bryan D. Smith. "Theoretical, thermal, and coordination chemistry of the amphoteric thiazate (NSO)1 ion." Canadian Journal of Chemistry 83, no. 12 (December 1, 2005): 2021–31. http://dx.doi.org/10.1139/v05-191.

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The isomers of thiazate (NSO) have a rich chemistry that is examined theoretically and experimentally for their thermal and coordination characteristics. The intramolecular isomerization of NSO to monothionitrite (ONS) is predicted (B3LYP/6-311+G*) to have a substantial barrier, greater than 418 kJ mol1. Thus, thiazates are expected to be relatively thermally stable towards isomerization, and DSC indicates that KNSO undergoes a two stage irreversible thermolytic decomposition only beginning at 132 °C with ΔH = 116.3 kJ mol1. As a ligand, the thiazate can adopt a range of geometries in response to the metal's oxidation state and ligand sphere. For example, in Ru(TTP)(NO)(NSO) the ligand has a markedly bent Ru-N-S geometry, and when contrasted with other structurally characterized thiazate coordination compounds, it is concluded that in addition to σ donation the thiazate binds to metals in an amphoteric manner because of either a forward or reverse OSN → M π donation similar to transition metal nitrosyl, amido, and imido complexes.Key words: thiazate, isomerization, thermolysis, amphoteric ligand, coordination chemistry.

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21

Bissinger, Philipp, Holger Braunschweig, Thomas Kupfer, and Krzysztof Radacki. "Monoborane NHC Adducts in the Coordination Sphere of Transition Metals." Organometallics 29, no. 17 (September 13, 2010): 3987–90. http://dx.doi.org/10.1021/om100634b.

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22

Davies, Alwyn G., and Paul F. McMillan. "Robin Jon Hawes Clark. 16 February 1935—6 December 2018." Biographical Memoirs of Fellows of the Royal Society 68 (January 8, 2020): 103–29. http://dx.doi.org/10.1098/rsbm.2019.0037.

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Robin Clark was a distinguished physical/inorganic chemist who made major discoveries in the coordination chemistry of the early transition metals, especially of titanium and vanadium complexes with high coordination numbers (notably seven and eight) and of the structures and physical properties of mixed valence, linear chain and metal–metal bonded compounds. He applied far-infrared spectroscopy to study metal–ligand vibrations systematically and established the technique for structure elucidation of transition metal and main group compounds. He also developed Raman and resonance Raman spectroscopy applied to inorganic compounds and highly coloured solids including mineral samples. That work led to his seminal applications of microbeam Raman spectroscopy for the identification of pigments and other constituents of artworks and historical artefacts, thereby developing a basis for testing their provenance and the identification of forgeries.

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23

Bedin, Michele, Alavi Karim, Marcus Reitti, Anna-Carin C. Carlsson, Filip Topić, Mario Cetina, Fangfang Pan, et al. "Counterion influence on the N–I–N halogen bond." Chemical Science 6, no. 7 (2015): 3746–56. http://dx.doi.org/10.1039/c5sc01053e.

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24

Orysyk, Svitlana, Vasyl Pekhnyo, Viktor Orysyk, Yuri Zborovskii, Polina Borovyk, and Vovk Mykhailo. "FUNDAMENTAL ASPECTS OF COORDINATION CHEMISTRY OF TRANSITION METALS WITH FUNCTIONALLY SUBSTITUTED THIOAMIDES (PART 2)." Ukrainian Chemistry Journal 88, no. 3 (April 28, 2022): 3–27. http://dx.doi.org/10.33609/2708-129x.88.03.2022.3-27.

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In the second part of the analytical review, the influence of polydentate and N-allyl-substituted thiamides on the course of complexation reactions with platinum metal ions and Ag(I) was analyzed. The potential of the obtained coordination compounds for their application in medical and analytical chemistry is also demonstrated. The presented results are obtained on the basis of joint research performed in the Department of "Chemistry of Complex Compounds" of the V.I. Vernadsky Institute of General and Inorganic Chemistry NAS of Ukraine together with the staff of the Department of “Chemistry of Heterocyclic Compounds” of the Institute of Organic Chemistry NAS of Ukraine. The example of the reaction of polydentate thioureas with metal ions shows that the increase in functional groups does not always lead to their simultaneous coordination with metal ions. For example, the migration of double bonds, which is characteristic of H2 L5 thioureas, contributes to the stiffness of heterocycles, which in turn reduces the dentat capacity of these thioureas as ligands, despite the localization of donor atoms in a favorable position for metallocycle formation. In addition, an increase in the number of donor centers in the thioamide molecule can lead to their intramolecular rearrangement under conditions of complexation, and to the occurs of redox reactions. It has been shown that the formation of a π coordination bond involved in the formation of a six-membered chelated metalocycle occurs only when, together with the C=C allyl moiety, other donor atoms of the organic ligand are at an unfavorable geometric location for metalocycle formation. Otherwise, the allyl group does not participate in the coordination to the central metal ion. A characteristic indicator of the formation of the π coordination bond is the splitting of the C3 H2 signal of allylic group protons in 1 H NMR spectra into two doublets with the same spin-spin interaction constant, as well as high-frequency shift of absorption bands of valence vibrations νas(CH)allyl, νs (CH) allyl in the IR spectra of π,n-chelate complexes.It was found that regardless of the stoichiometry of the starting components, the reaction of N-allyl-substituted thioamides HL10-12 with platinum metal ions leads to the formation of complexes only in the ratio M:L=1:1, due to the strong "trans-effect" of the allylic fragment. It was found that a number of n,π-chelate complexes of palladium(II) and platinum(II) with general formula [Pd/Pt(HL10-12)Hal2 ] (Hal = Cl-, Br- , I- ), which are structurally analogous to the known antitumor agent cisplatin, show effective antitumor action: antiproliferative, cytotoxic, anti-metastatic, proapoptotic. However, unlike cisplatin, they have proven to be much more effective: they are stable over a wide pH range; have the ability to overcome the resistance of pathogenic cells to the action of antitumor agents and show a wider range of action. The method of molecular docking was used to study the possible mechanism of interaction of the studied complexes, ie the most probable orientation and location of the complex molecule relative to the protein site of DNA binding was determined by mathematical modeling. Thioamide H2 L1 has been found to be an effective universal analytical reagent for the determination, extraction and separation of Ru(III), Rh(III) and Pd(II) from model solutions of their chlorides. The difference in the formation of anionic complexes of these metals and their ionic associations with the cationic dye atrafloxin is the basis of the developedmethod of extraction-photometric determination and stepwise separation of Ru(III), Rh(II) and Pd(II), which is important for applied aspects chemistry.

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25

Bruce, MI, and AH White. "Some Chemistry of Pentakis(methoxycarbonyl)cyclopentadiene, HC5(CO2Me)5, and Related Molecules." Australian Journal of Chemistry 43, no. 6 (1990): 949. http://dx.doi.org/10.1071/ch9900949.

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This article summarizes the results of investigations into the chemistry of HC5(CO2Me)5 and, in particular, of metal complexes containing the C5(CO2Me)5 ligand . As an anion, the ligand is very stable, forming air-stable, water-soluble salts with many cations with coordination to the metal atom in the solid state generally occurring through the ester carbonyl groups. Second- and third-row transition metals form complexes which retain the covalent ligand-metal bond in solution, 'harder' metals coordinating by the ester carbonyl groups, while 'softer' metals are bound to the ring carbons; a variety of behaviour is shown by the Group 11 metals. Even when the ligand is η5-bonded to the metal, ready displacement by other ligands may occur, as found with Ru (η-C5H5){η5-C5(CO2Me)5}, for example. In the rhodium system, formal replacement of CO2Me groups by hydrogen is found, as with the formation of [ Rh {η5-C5H2(CO2Me)3}2][C5(CO2Me)5]. Brief mention is made of other polysubstituted cyclopentadienyls with electron-withdrawing ligands and some related compounds, and their metal derivatives where known.

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26

Karasik, A. A., O. G. Sinyashin, J. Heinicke, and E. Hey-Hawkins. "Phosphino Amino Acids: Novel Water-Soluble Ligands for Coordination Chemistry of Transition Metals." Phosphorus, Sulfur, and Silicon and the Related Elements 177, no. 6-7 (June 1, 2002): 1469–71. http://dx.doi.org/10.1080/10426500212226.

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27

Matsuo, Tsukasa, and Hiroyuki Kawaguchi. "Tridentate Aryloxide Ligands: New Supporting Ligands in Coordination Chemistry of Early Transition Metals." Chemistry Letters 33, no. 6 (June 2004): 640–45. http://dx.doi.org/10.1246/cl.2004.640.

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28

Castañeda, Raúl, Bulat Gabidullin, and Jaclyn L. Brusso. "Exploring the coordination chemistry of imidoyl amidine ligands with first-row transition metals." Acta Crystallographica Section A Foundations and Advances 74, a1 (July 20, 2018): a153. http://dx.doi.org/10.1107/s010876731809846x.

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29

Mathey, F., Angela Marinetti, Siegfried Bauer, and Pascal Le Floch. "Chemistry of phosphorus-carbon double bonds in the coordination sphere of transition metals." Pure and Applied Chemistry 63, no. 6 (January 1, 1991): 855–58. http://dx.doi.org/10.1351/pac199163060855.

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30

Peruzzini, Maurizio, Isaac De Los Rios, and Antonio Romerosa. "ChemInform Abstract: Coordination Chemistry of Transition Metals with Hydrogen Chalcogenide and Hydrochalcogenido Ligands." ChemInform 33, no. 31 (May 20, 2010): no. http://dx.doi.org/10.1002/chin.200231251.

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31

Kubas, Gregory J. "Activation of dihydrogen and coordination of molecular H2 on transition metals." Journal of Organometallic Chemistry 751 (February 2014): 33–49. http://dx.doi.org/10.1016/j.jorganchem.2013.07.041.

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32

Vitiu, A., Ed Coropceanu, and P. Bourosh. "Coordination Compounds of Transition Metals with Rhodanine-3-Acetic Acid." Russian Journal of Coordination Chemistry 47, no. 11 (November 2021): 717–29. http://dx.doi.org/10.1134/s1070328421110063.

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33

Kozáček, Pavel, Libor Dostál, Aleš Růžička, Ivana Císařová, Zdeněk Černošek, and Milan Erben. "Synthesis and coordination properties of new σ2,λ3-P/N switchable chelators based on [1,2,3]-diazaphosphole." New Journal of Chemistry 43, no. 34 (2019): 13388–97. http://dx.doi.org/10.1039/c9nj03146d.

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34

Gang, Zhao, Cao Yuan, and Wang Zhongming. "Coordination Compounds of Dimethyl 1, 1′-Diacetylferrocenebis(hydrazonatocarbodithioate) with Transition Metals." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 26, no. 4 (April 1996): 617–25. http://dx.doi.org/10.1080/00945719608004766.

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35

Yunyin, Niu, Zhang Hongyun, Jia Handong, Wu Qingan, Li Feng, and Zhang Hongquan. "Studies on Formylferrocenyl Salicyloylhydrazone and Its Coordination Compounds with Transition Metals." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 27, no. 10 (November 1997): 1491–500. http://dx.doi.org/10.1080/00945719708003153.

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36

Panyushkin, V. T., A. B. Fursina, N. N. Bukov, and R. V. Gorokhov. "New Coordination Compounds of Transition Metals with 5-Nitro-2-Amidrazonofuran." Russian Journal of General Chemistry 74, no. 7 (July 2004): 1132–224. http://dx.doi.org/10.1023/b:rugc.0000045880.46257.7b.

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37

Baumgartner, Judith, and Christoph Marschner. "Coordination of non-stabilized germylenes, stannylenes, and plumbylenes to transition metals." Reviews in Inorganic Chemistry 34, no. 2 (June 1, 2014): 119–52. http://dx.doi.org/10.1515/revic-2013-0014.

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AbstractComplexes of transition metals with heavy analogs of carbenes (tetrylenes) as ligands have been studied now for some 40 years. The current review attempts to provide an overview about complexes with non-stabilized (having no π-donating substituents) germylenes, stannylenes, and plumbylenes. Complexes are known for groups 4–11. For groups 6–10 not only examples of monodentate tetrylene ligands, but also of bridging ones are known. While this review covers almost 200 complexes, the field in general has been approached only very selectively and real attempts for systematic studies are very scarce. Although some isolated reports exist which deal with the reactivity of the tetrylene complexes most of the so far published work concentrates on synthesis and characterization.

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38

Vega, Andrés, and Jean-Yves Saillard. "Stabilization of Acepentalene by Coordination to Transition Metals: A DFT Investigation." Inorganic Chemistry 46, no. 8 (April 2007): 3295–300. http://dx.doi.org/10.1021/ic070083l.

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39

Orysyk, Svitlana, Vasyl Pekhnyo, Viktor Orysyk, Yuri Zborovskii, Polina Borovyk, and Vovk Mykhailo. "FUNDAMENTAL ASPECTS OF THE COORDINATION CHEMISTRY OF TRANSITION METALS WITH FUNCTIONALLY SUBSTITUTED THIOAMIDES (PART 1)." Ukrainian Chemistry Journal 88, no. 2 (March 25, 2022): 85–115. http://dx.doi.org/10.33609/2708-129x.88.02.2022.85-115.

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The influence of competitive coordination, a tautomeric form of functionally substituted thioamides, conditions of synthesis and nature of the metal on the course of the reaction and structure of mono-, bi, and polynuclear complexes of 3d, 4d-metals is considered based on results obtained in the Department of "Chemistry of Complex Compounds" of the V.I. Vernadsky Institute of General and Inorganic Chemistry NAS of Ukraine, together with the staff of the Department of “Chemistry of Heterocyclic Compounds” of the Institute of Organic Chemistry NAS of Ukraine. The influence of ligand denticity, as well as conditions of complex formation on the structure of obtained complexes and their polymorphic modifications, was studied based on the reaction of d-metals with functionally substituted N, S- and O, N, S-containing thioamides. In addition, it is proved the influence of tautomeric forms of thioamides on the stereochemistry of coordination polyhedra: it is found that the thionic tautomeric form promotes the transposition of thioureas, while the thiol form promotes its cis-position in the square-planar of a polyhedron of 3d, 4d-metals in the structure of complexes. However, it was found that the thion tautomeric form leads to the formation of octahedral, while the thiol form to the square-planar of coordination nodes in complexes of Cu(II) and Ni(II), which are characterized by a change in coordination polyhedra (from square-planar and tetrahedron to octahedron) that depending on the strength of the ligand field. It is obvious that this effect of tautomeric forms of thioamides is associated with the formation of a conjugate system of double bonds in their molecules. In this case, the transition of thioamide to thiol form depends on the pH and the nature of the organic solvent: in a weakly alkaline medium or polar organic solvent (pyridine, chloroform) there is a shift of equilibrium towards to the dominance of thiol tautomeric form. It was found that the thionic tautomeric form of thioamides (depending on pH and substituent composition) reacts with metal salts mainly in neutral form or in the monoanionic form, forming complexes of molecular or ionic nature, while thiol form reacts in the form of dianion, forming complexes preferably anionic type. Ionic compounds are usually soluble or sparingly soluble in water in low concentrations (10-3–10-5 mol/l), while compounds of the molecular type are soluble only in DMSO and DMF. It is shown that the stereoselective synthesis of various ligand complexes is carried out mainly in three ways: 1) by the interaction of the initial components in the corresponding stoichiometry. In this case, the vacancy in the metal environment is occupied by either the anions of the starting metal salt (Hal-, SO42-, NO3-, CH3COO-, etc.) or other organic molecules (triphenylphosphine, pyridine, etc.); 2) carrying out parallel reactions (hydrolysis and oxidation of thioureas), which lead to participation in the coordination of by-products of the reaction; 3) carrying out reactions with intraligand rearrangements, which leads to the cyclization of organic ligands and coordination of the products of their transformation to the central metal ion. However, it was found that hydrolysis / oxidation or intraligand cyclization of substituted polydentate thioamides can occur both under the action of synthesis conditions and under the action of complexing metals as promoters of organic reactions. It was found that depending on the temperature and time of interaction of the starting reagents, different polymorphic modifications of complexes (triclinic or monoclinic) are formed, which differ in packing density and the nature of intermolecular interactions. As a result, such polymorphic modifications have different solubilities in water, which is important for the controlled synthesis of appropriate structures and their practical application.

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40

Georgiev, I. O., A. A. Karasik, and G. N. Nikonov. "Bis(O-Carboxyphenylaminomethyl)Phenylphosphine - A Novel Hybride Ligand in Coordination Chemistry of Transition Metals." Phosphorus, Sulfur, and Silicon and the Related Elements 111, no. 1 (April 1, 1996): 133. http://dx.doi.org/10.1080/10426509608054762.

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41

Normand, Adrien T., E. Daiann Sosa Carrizo, Corentin Magnoux, Esteban Lobato, Hélène Cattey, Philippe Richard, Stéphane Brandès, et al. "Reappraising Schmidpeter's bis(iminophosphoranyl)phosphides: coordination to transition metals and bonding analysis." Chemical Science 12, no. 1 (2021): 253–69. http://dx.doi.org/10.1039/d0sc04736h.

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The synthesis, characterization and computational analysis of a range of bis(iminophosphoranyl)phosphide (BIPP) group 4 and coinage metals complexes is reported. White phosphorus was used to install the central phosphorus atom.

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42

Moulis, Jean-Marc. "Cellular Dynamics of Transition Metal Exchange on Proteins: A Challenge but a Bonanza for Coordination Chemistry." Biomolecules 10, no. 11 (November 21, 2020): 1584. http://dx.doi.org/10.3390/biom10111584.

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Transition metals interact with a large proportion of the proteome in all forms of life, and they play mandatory and irreplaceable roles. The dynamics of ligand binding to ions of transition metals falls within the realm of Coordination Chemistry, and it provides the basic principles controlling traffic, regulation, and use of metals in cells. Yet, the cellular environment stands out against the conditions prevailing in the test tube when studying metal ions and their interactions with various ligands. Indeed, the complex and often changing cellular environment stimulates fast metal–ligand exchange that mostly escapes presently available probing methods. Reducing the complexity of the problem with purified proteins or in model organisms, although useful, is not free from pitfalls and misleading results. These problems arise mainly from the absence of the biosynthetic machinery and accessory proteins or chaperones dealing with metal / metal groups in cells. Even cells struggle with metal selectivity, as they do not have a metal-directed quality control system for metalloproteins, and serendipitous metal binding is probably not exceptional. The issue of metal exchange in biology is reviewed with particular reference to iron and illustrating examples in patho-physiology, regulation, nutrition, and toxicity.

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43

Villamizar-Delgado, Stephanny, Laura M. Porras-Osorio, Octavio Piñeros, Javier Ellena, Norman Balcazar, Ruben E. Varela-Miranda, and Richard F. D'Vries. "Biguanide–transition metals complexes as potential drug for hyperglycemia treatment." RSC Advances 10, no. 38 (2020): 22856–63. http://dx.doi.org/10.1039/d0ra04059b.

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Coordination compounds of Cu(ii), Ni(ii), Co(ii), and Zn(ii) with a type of biguanide were obtained and structurally characterized. The new metal-drugs present biological applications as potential drugs for diabetes and metabolic syndrome.

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44

Nimax, Patrick R., Nils Rotthowe, Florian Zoller, Tobias Blockhaus, Fritz Wagner, Dina Fattakhova, and Karlheinz Sünkel. "Coordination polymers of 5-substituted 1,2,3,4-tetracyanocyclopentadienides: structural and electrochemical properties of complex compounds of 5-amino- and 5-nitro-tetracyanocyclopentadienide." Dalton Transactions 50, no. 47 (2021): 17643–52. http://dx.doi.org/10.1039/d1dt02866a.

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Two electron-deficient polycyanated cyclopentadienides, utilized as ligands in coordination polymers with transition- and alkaline metals, show a reductive behavior to yield their neutral radicals when subjected to UV-light.

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45

Kubas, Gregory J. "Molecular hydrogen complexes: coordination of a .sigma. bond to transition metals." Accounts of Chemical Research 21, no. 3 (March 1988): 120–28. http://dx.doi.org/10.1021/ar00147a005.

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46

Ovsyannikov, A. S., S. Ferlay, S. E. Solovieva, I. S. Antipin, A. I. Konovalov, N. Kyritsakas, and M. W. Hosseini. "Molecular tectonics: high dimensional coordination networks based on methylenecarboxylate-appended tetramercaptothiacalix[4]arene in the 1,3-alternate conformation." CrystEngComm 20, no. 8 (2018): 1130–40. http://dx.doi.org/10.1039/c7ce02105d.

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47

Goswami, Soumyabrata, Bharat Kumar Tripuramallu, and Israel Goldberg. "Novel meso-substituted trans-A2B2 porphyrins: synthesis and structure of their metal-mediated supramolecular assemblies." CrystEngComm 19, no. 45 (2017): 6845–57. http://dx.doi.org/10.1039/c7ce01642e.

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Five novel trans-A₂B₂ porphyrins and their corresponding coordination polymers with transition metals have been synthesized. Absorption and emission studies and structural investigations define the coordination patterns of these compounds in the solid state.

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48

Pandiarajan, Devaraj, Thomas Fox, and Bernhard Spingler. "An N4-Tetradentate Hydrazone Ligand That Binds in a Neutral, Mono- and Bisdeprotonated Form to Iron(II) and Zinc(II) Metal Ions." Crystals 11, no. 8 (August 19, 2021): 982. http://dx.doi.org/10.3390/cryst11080982.

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The coordination chemistry of butane-2,3-dione bis (2′-pyridylhydrazone) towards the divalent first-row transition metals zinc and iron has been explored. Depending upon the conditions, the ligand in the six complexes was found to be either neutral, mono, or doubly deprotonated. The zinc(II) and iron(II) complexes were fully characterized by elemental analysis, mass spectrometry, and X-ray diffraction methods.

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49

Launay, Maxence, and Richard Dronskowski. "ATheoretical Study on the Existence and Structures of Some Hypothetical First-Row Transition-Metal M(NCN) Compounds." Zeitschrift für Naturforschung B 60, no. 4 (April 1, 2005): 437–48. http://dx.doi.org/10.1515/znb-2005-0415.

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The family of quasi-binary cyanamides/carbodiimides of general formula M(NCN) containing divalent 3d transition metals (M = Mn, Fe, Co, Ni and Cu) has been studied by density-functional means; until now, such light transition-metal compounds have not yet been prepared. Twenty-eight structural models have been considered based on known compounds having NCN2− and other triatomic anionic entities (e. g., thiocyanates). After performing LDA geometry optimizations, the relative energetic orderings are interpreted in terms of geometrical factors such as molar volumes and effective coordination numbers; dense structures with octahedral metal coordinations and highspin electronic configurations are to be expected, especially for the earlier metals (Mn and Fe). Based on GGA total-energy calculations, there is a chance to synthesize these enthalpically unstable compounds, not from the elements but via appropriate exchange reactions employing fairly stable cyanamide/carbodiimide precursors and yielding stable or volatile metal halides which can be removed from the chemical equilibria

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50

Scheer, Manfred, Kay Schuster, and Uta Becker. "Different Ways of P4 Transformation in the Coordination Sphere of Transition Metals." Phosphorus, Sulfur, and Silicon and the Related Elements 109, no. 1 (1996): 141–44. http://dx.doi.org/10.1080/10426509608545110.

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