Academic literature on the topic 'Imido complexes form'
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Journal articles on the topic "Imido complexes form"
Brown, Martyn, and Chet Jablonski. "Synthesis, characterization, and CN bond cleavage of tungsten(VI)arylimido-calix[4]arene complexes." Canadian Journal of Chemistry 79, no. 5-6 (May 1, 2001): 463–71. http://dx.doi.org/10.1139/v00-131.
Full textDesnoyer, Addison N., Weiling Chiu, Candy Cheung, Brian O. Patrick, and Jennifer A. Love. "Oxaziridine cleavage with a low-valent nickel complex: competing C–O and C–N fragmentation from oxazanickela(ii)cyclobutanes." Chemical Communications 53, no. 92 (2017): 12442–45. http://dx.doi.org/10.1039/c7cc07690h.
Full textTomson, Neil C., Nickolas H. Anderson, Aaron M. Tondreau, Brian L. Scott, and James M. Boncella. "Oxidation of uranium(iv) mixed imido–amido complexes with PhEEPh and to generate uranium(vi) bis(imido) dichalcogenolates, U(NR)2(EPh)2(L)2." Dalton Transactions 48, no. 29 (2019): 10865–73. http://dx.doi.org/10.1039/c9dt00680j.
Full textIkeda, Hideaki, Kohei Nishi, Hayato Tsurugi, and Kazushi Mashima. "Metathesis cleavage of an NN bond in benzo[c]cinnolines and azobenzenes by triply-bonded ditungsten complexes." Chemical Communications 54, no. 30 (2018): 3709–11. http://dx.doi.org/10.1039/c7cc08570b.
Full textXing, Tian, Mark R. J. Elsegood, Sophie H. Dale, and Carl Redshaw. "Pentamethylcyclopentadienyl Molybdenum(V) Complexes Derived from Iodoanilines: Synthesis, Structure, and ROP of ε-Caprolactone." Catalysts 11, no. 12 (December 20, 2021): 1554. http://dx.doi.org/10.3390/catal11121554.
Full textIshii, Youichi, Shin'ichi Tokunaga, Hidetake Seino, and Masanobu Hidai. "Synthesis of Tungsten (1-Pyridinio)imido Complexes: Facile N−N Bond Cleavage To Form Pyridine from Coordinated Dinitrogen1." Inorganic Chemistry 35, no. 18 (January 1996): 5118–19. http://dx.doi.org/10.1021/ic960632f.
Full textMoubaraki, Boujemaa, Keith S. Murray, Peter J. Nichols, Scott Thomson, and Bruce O. West. "The synthesis, reactivity and magnetic susceptibilities of Cr(IV)porphyrin imido complexes, CrN(R), and attempts to form heterobinuclear μ-imido compounds with CrN(R)V and CrN(R)Fe bridges." Polyhedron 13, no. 3 (January 1994): 485–95. http://dx.doi.org/10.1016/s0277-5387(00)81665-4.
Full textLeovac, Vukadin, Vladimir Divjakovic, Valerija Cesljevic, and Milena Rakocevic. "Transition metal complexes with thiosemicarbazide-based ligands. Part 51. Square-planer nickel(II)complex with acetylacetone bis(S-n-propylisothiosemicarbazone)(L).Crystal and molecular structure of [." Journal of the Serbian Chemical Society 71, no. 6 (2006): 593–604. http://dx.doi.org/10.2298/jsc0606593l.
Full textLock, Nina, Julia Matussek, and Dietmar Stalke. "Se-N chemistry: Revisiting an old molecule in the design of novel compounds." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C914. http://dx.doi.org/10.1107/s2053273314090858.
Full textJazwinski, S. M. "Participation of ATP in the binding of a yeast replicative complex to DNA." Biochemical Journal 246, no. 1 (August 15, 1987): 213–19. http://dx.doi.org/10.1042/bj2460213.
Full textDissertations / Theses on the topic "Imido complexes form"
Jiang, Bing. "Nickel and cobalt bis (imino)pyridine complexes as catalysts for the hydrogen evolution reaction." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667777.
Full textSustainable energy supply is a critical challenge humanity is facing. The dependence of fossil fuels have ignited interest in the development of carbon-free energy sources, among which energy-dense dihydrogen would be one of the most promising when generated from renewable alternatives. In this context, splitting water to produce hydrogen as fuel is of great interest, and hence a large number of catalysts made from earth-abundant transition metals have been developed to accelerate the reaction rate. For the purpose of effectively using metal-atom economy and facilitating mechanistic analysis, molecular complexes as homogenous catalysts got much attention. In this kind of compounds, metal centres are usually required to accommodate multiple redox states and experience metal-hydride intermediates. However, there has been a renaissance in catalysts’ design for the hydrogen evolution reaction (HER) by coordinating the metal centre with non-innocent ligands who can operate as an electron reservoir or/and protonation site. The first Chapter of this PhD Thesis generally introduce the need and techniques for hydrogen production to support the energy demand, reviewing electrocatalysts for the HER based on the non-noble metals nickel and cobalt. The second Chapter describes the objectives of this Thesis, i.e., the synthesis and characterization of redox-active pyridine diimine (PDI)-based ligands and the corresponding nickel and cobalt complexes. Their electrocatalytic evaluation in HER is aimed, as well as the description of the processes from the mechanistic point of view. The third Chapter presents the preparation of a set of pentadentate PDI ligands, synthesis and full characterization of six-coordinated Ni(II) complexes [Ni(Ph2PPrPDI)(Cl)](Cl) (1(Cl)) and [Ni(Ph2PPrPDI(p)Cl)(Cl)](Cl) (2(Cl)) using techniques including mass spectroscopy, UV-vis spectroscopy, X-ray crystallography and elemental (C, H, N) analysis. The electron location upon electrochemical reduction of 1(Cl) was examined by density functional theory (DFT) calculations along with electron paramagnetic resonance (EPR), revealing the metal-based nature for the first one-electron reduction and ligand-based for the second one. The redox and catalytic properties of both complexes were studied. On the one hand, more positive redox potential and therefore lower overpotential were observed for 2(Cl), indicating that the presence of the electron-withdrawing Cl substituent in the PDI ligand scaffold improves the electrocatalytic activity. On the other hand, 1(Cl) is more active for the HER in terms of turnover frequency and rate constant. Short-term stability studies for 1(Cl) and 2(Cl) in the course of HER by CV indicates homogenous catalysis without decomposition, whereas long-term stability analysed by controlled potential electrolysis shows the generation of a new transitory species which can trigger the hydrogen oxidation reaction and reduce the overpotential for the HER. The fourth Chapter focus on the synthesis and characterization of five-coordinated Co complexes bearing the ligands applied in the third Chapter ([CoI(Ph2PPrPDI](BF4), 3(BF4) and [CoI(Ph2PPrPDI(p)Cl](BF4), 4(BF4)). Electrochemistry data shows that these complexes are active for the HER in organic media, undergoing protonation to form Co(III) hydride species which were identified by UV-vis and NMR spectroscopy. On the basis of NMR spectroscopy, the initial Co(I) compound was recovered after a catalytic reaction cycle, demonstrating a homolytic mechanism for HER by this system. Finally, the fifth Chapter lists the most relevant conclusions extracted from the work carried out.
Alexander, John Bryson 1972. "Chiral molybdenum and tungsten imido alkylidene complexes as catalysts for asymmetric ring-closing metathesis (ARCM)." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/44898.
Full textIncludes bibliographical references (leaves 172-179).
Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetric ring-closing metathesis (ARCM) is described. -- Chapter 5. Synthesis, characterization and reactivity of (±)(Me2)W(Neo) and (±)(iPr 2)W(Neo) . PMe2Ph is discussed.
by John Bryson Alexander.
Ph.D.
Bai, Guangcai. "New methods for the syntheses of amido, imido, nitrido and dinitrogen metal complexes and organometallic hydrides and oxides." Doctoral thesis, [S.l.] : [s.n.], 2001. http://webdoc.sub.gwdg.de/diss/2002/bai/bai.pdf.
Full textBoudier, Adrien. "Design, synthesis and characterization of new ligands and activators for the oligomerization of ethylene by iron complexes." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00868786.
Full textSmit, Theodoor Martin. "Heteroatom substituted bis(imino)pyridine and bis(phenoxy-amine) transition metal complexes for olefin polymerisation." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420626.
Full textMomin, Mohasin [Verfasser], and Michael R. [Akademischer Betreuer] Buchmeiser. "Structure-property insights into molybdenum imido alkylidene N-heterocyclic carbene complexes for olefin metathesis / Mohasin Momin ; Betreuer: Michael R. Buchmeiser." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2021. http://d-nb.info/1233287842/34.
Full textYeh, Yu-Cheng, and 葉聿正. "Synthesis, Characterization, and Catalytic Application forC-C Coupling Reactions of Palladium Imino-N-HeterocyclicCarbene Complexes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/27738456052224178887.
Full text中興大學
化學系所
95
Synthetic and structural studies of Pd(II) and Ag(I) complexes of iminoyl-substituted N-heterocyclic carbine ligands. Reaction of 2a-c with Ag2O leads to the silver carbene complexes (C–N)AgBr (3a-c). Carbene transfer from Ag to Pd occurs when compounds 3a-c are treated with PdCl2 to yield bis(carbene) complexes (C–N)2PdCl2 (4a-c). The molecular structures of the complexes 3c and 4b have been determined by X-ray diffraction studies, which revealed the palladium complex 4b had a trans square-planar geometry at their respective metal centers. In a trans coordination geometry, the two carbene ligands can have their two N(imidazole) substituents oriented in the same or in the opposite directions with respect to the coordination plane, denoted syn and anti for 4a-c. The in situ Pd(OAc)2-2a-c and complexes 4a-c were found to be active catalysts for the Heck and Suzuki C-C coupling reactions, the less reactive aryl chloride substrates can also be used.
Bai, Guangcai [Verfasser]. "New methods for the syntheses of amido, imido, nitrido and dinitrogen metal complexes and organometallic hydrides and oxides / vorgelegt von Guangcai Bai." 2001. http://d-nb.info/964398524/34.
Full textChang, Chin-Hsiang, and 張進翔. "Synthesis and Structural Determination of Zinc Complexes Supportedby Imino-Benzotriazole Phenoxide Ligands:Catalytic Studies for Ring-Opening Polymerization of Cyclic Esters." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/69981729543520998155.
Full text中原大學
化學研究所
101
Four imino-benzotriazole phenoxide ligands, C1DMeIBTP-H (A), C1DIPIBTP-H (B), C1PhIBTP-H (C) and C1BnIBTP-H (D) were prepared in good yield(≧70%) from the condensation of 3-(2H-benzotriazol-2-yl)-2-hydroxy- 5-methyl benzaldehyde (C1AldBTP-H) with benzylamine or arylamine (aniline, 2,6-dimethylaniline and 2,6-diisopropylaniline (1.1 equiv.)) in solvent (toluene or ether). Zinc catalysts supported by imino-benzotriazole phenoxide ligands were characterized by microanalyses as well as single-crystal X-ray structural determinations. Treatment of the ligand (C1DMeIBTP-H or C1DIPIBTP-H) with 1.0 mol equiv. of ZnEt2 in toluene under the same stoichiometric proportion afforded the dimeric zinc complexes ([(-C1DMeIBTP)ZnEt]2 (1); [(-C1DIPIBTP)ZnEt]2 (2)) in 50% and 53% yields, respectively. The reaction of diethyl zinc (ZnEt2) with C1PhIBTP-H or C1BnIBTP-H (2.0 equiv.) yields tetra-coordinated monomeric zinc complex [(C1PhIBTP)2Zn] (3) or [(C1BnIBTP)2Zn] (4). Catalysis for ring-opening polymerization (ROP) of -caprolactone (-CL), -butyrolactone (-BL), and L-lactide (L-LA) of complexes 1-2 are investigated. Zinc complexes 1 and 2 catalyze the ring-opening polymerization of -caprolactone (-CL) in the presence of 9-anthracenemethanol (9-AnOH) with efficient catalytic activities in a controlled fashion. Additionally, polymerizations of -butyrolactone (-BL) catalyzed by complex 1 and 2 are demonstrated in a “living” character with the expected molecular weights and narrow molecular weight distributions. To examine stereoselectivity of PHB, complex 1 and 2 were employed as catalysts toward ROP of -BL. Experimental results exhibit that complex 1 or complex 2 catalyzes -BL to produce atactic PHB (Pr = 0.48). Furthermore, complex 1 catalyzes rac-LA to yield heterotactic PLA (Pr = 0.66). We also investigate the reaction rate of ring-opening polymerization by complex 1 in the presence of 9-AnOH catalyzes -CL, -BL, and L-LA. In addition, complex 3 and complex 4 are demonstrated to catalyze the ROP of L-LA in the presence of 9-AnOH. However, the catalytic activity and reaction time of complex 3 are much better than complex 4.
Liu, Dei-Cheng, and 劉得丞. "Synthesis and Structural Determination of Zinc and Titanium Complexes Supported by Sulfonate and Imino-Benzotriazole Phenoxide Ligand:Catalytic Studies for Ring-Opening Polymerization of Cyclic Esters." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/djn76p.
Full text中原大學
化學研究所
102
Four novel sulfonate phenol ligands, HBBTP(OS)-H (A), CH3BBTP(OS)-H (B), OMeBBTP(OS)-H (C) and CF3BBTP(OS)-H (D), have been prepared by the sulfonylation ) with one molar equiv of the corresponding 4-substituted benzenesulfonyl chloride in the presence of excess triethylamine. Zinc (Zn) complexes supported by sulfonate phenoxide ligands have been synthesized and characterized by microanalyses. The reaction of diethyl zinc (ZnEt2) with one equivalent amount of RBBTP(OS)-H (R=H, CH3, OMe and CF3) produces the monomeric zinc complex [HBBTP(OS)ZnEt] (A), [CH3BBTP(OS)ZnEt] (B), [OMeBBTP(OS)ZnEt] (C) and [CF3BBTP(OS)ZnEt] (D). Catalysis for ring-opening polymerization (ROP) of -caprolactone (-CL), -butyrolactone (-BL) and L-Lactide (L-LA) of complexes (2)-(4) are investigates. Zinc complexes (2)-(4) catalyze the ring-opening polymerization of -CL in the presence of 9-anthracenemethanol (9-AnOH) with efficient catalytic activities in a controlled fashion. In -CL polymerization, the activity of complex (4) is higher than that of complex(3) and (2), which is probably due to the higher Lewis acidity of Zn2+ metal caused by electron-withdrawing substitute, trifluoromethyl(-CF3) on the 4-position of the benzenesulfonate group. Additionally, polymerization of -BL and L-LA catalyzed by complex (4) is demonstrated in a“living”and“immortal”character with the expected molecular weights and narrow molecular weight distributions. To examine stereoselectivity of PLA, complex (4) was employed as catalysts toward ROP of rac-LA. Experimental results exhibit that complex (4) catalyzes rac-LA to produce atactic PLA (Pr = 0.50). Furthermore, complex (4) catalyzes -BL to yield atactic PHB (Pr = 0.46). We also investigate the reaction rate of ring-opening polymerization by complex (4) in the presenceof 9-AnOH catalyzes -CL, -BL and L-LA. Three imino-benzotriazole phenoxide ligand, C1NNIBTP-H (E), C1PPIBTP-H (F), C1PrIBTP-H (G), C1FuIBTP-H (H), C1NOIBTP-H (I) have been prepared in good yield(≧70%) from the condensation of 3-(2H-benzotriazol-2-yl)-2-hydroxy-5-methyl benzaldehyde (C1AldBTP-H) with N, N-dimethylethylenediamine, N-(2-Aminoethyl)piperidine, 2-(Aminomethyl)pyridine, Furfurylamine and 2-Methoxyethylamine (1.1 equiv.) inether solvent. Titanium catalysts supported by imino-benzotriazole phenoxide ligands were characterized by microanalyses as well assingle-crystal X-ray structural determinations. The reaction of Titanium isopropoxide (Ti(OiPr)4) with C1NNIBTP-H yields six-coordinated monomeric titanium complex [(C1NNIBTP)Ti(OiPr)3] (5). Catalysis for ROP of -CL, -BL and L-LA of complex (5) is investigated. Titanium complex (5) catalyze the ROP of -CL in the presence of isopropanol (IPA) with efficient catalytic activities in a controlled manner. Additionally, polymerizations of L-LA catalyzed by complex (5) is demonstrated in a“living”and“immortal”character with the expected molecular weights and narrow polydispersity indexes (PDIs). To examine stereoselectivity of PLA, complex (5) was employed as catalysts toward ROP of rac-LA. Experimental results exhibit that complex (5) catalyzes rac-LA to produce atactic PLA (Pr = 0.50). We also investigate the reaction rate of ring-opening polymerization by complex (5) in the presenceof IPA catalyzes -CL, -BL and L-LA. The reaction of Titanium isopropoxide (Ti(OiPr)4) with C1FuIBTP-H, C1NOIBTP-H yields six-coordinated dinuclear titanium complex [(C1FuIBTP)2Ti(OiPr)2] (6) and [(C1NOIBTP)2Ti(OiPr)2] (7). Complexes (6)-(7) were characterized by 1H and 13C NMR spectroscopy, elemental analyses determinations. Titanium complex (5) catalyze the ROP of -CL and L-LA in the presence of isopropanol (IPA) with optimal conditions. Each of complex (6)-(7) catalyze the ROP of -CL and L-LA. In -CL and L-LA polymerization, the activity of complex (5) is higher than that of complex (6) and (7).
Book chapters on the topic "Imido complexes form"
Blaise, Didier, and Sabine Fürst. "Post-CAR-T Cell Therapy (Consolidation and Relapse): Lymphoma." In The EBMT/EHA CAR-T Cell Handbook, 169–71. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94353-0_33.
Full textConference papers on the topic "Imido complexes form"
van den Berg, E. A., E. Sprengers, M. Jaye, W. Burgess, and V. W. M. van Hinsbergh. "REGULATION OF PLASMINOGEN ACTIVATOR INHIBITOR-1 mRNA IN HUMAN ENDOTHELIAL CELLS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1642856.
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