- Carbon dioxide cleavage by a Ni2 complex supported by a binucleating bis(N-heterocyclic carbene) framework Dedicated to Prof. John E. Bercaw on the occasion of his 70th birthday.
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A binucleating bis(N-heterocyclic carbene) ligand was designed as a means to coordinate and proximally constrain two transition metal centers. Using an imidazopyridine-based NHC afforded a framework structurally related to previously reported para-terphenyl diphosphines. Bimetallic copper, cobalt, and nickel complexes supported by this framework were synthesized and structurally characterized. Strong interactions between the metal centers and the central arene were observed in all nickel complexes. Dinickel(0) complexes of this ligand framework were found to react with CO2 to form a dicarbonyl-bridged dinickel(0) product, demonstrating facile CO2 reduction.
- Tsui, Emily Y.,Agapie, Theodor
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- An Original L-shape, Tunable N-Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis
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The synthesis and characterization of original NHC ligands based on an imidazo[1,5-a]pyridin-3-ylidene (IPy) scaffold functionalized with a flanking barbituric heterocycle is described as well as their use as tunable ligands for efficient gold-catalyzed C
- Tang, Yue,Benaissa, Idir,Huynh, Mathieu,Vendier, Laure,Lugan, No?l,Bastin, Stéphanie,Belmont, Philippe,César, Vincent,Michelet, Véronique
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supporting information
p. 7977 - 7981
(2019/05/17)
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- Non-symmetrical, potentially redox non-innocent imino NHC pyridine 'pincers': Via a zinc ion template-assisted synthesis
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New non-symmetrical, redox-active imino NHC pyridine pincer ligands, 2-(R1-imidazol-2-ylidene)-6-(R2NCH)-pyridine (R1 = 2,6-diisopropylphenyl (DiPP), R2 = 2,4,6-trimethylphenyl (Mes), 4B; R1 = R2 = DiPP, 4C), have been accessed by a ZnII-promoted modular synthesis involving the quaternization of R1-imidazole by [Zn(κNimineκNpyridine)(2-(R2NCH)-6-bromo-pyridine)Cl2], followed by ZnII removal and deprotonation of imidazolium pro-ligands. Redox active forms of 4B were implicated in the two complexes obtained by its reaction with FeBr2/KC8; metrical data analysis pointed to the occurrence of radical anionic and dianionic redox states of 4B.
- Simler, Thomas,Danopoulos, Andreas A.,Braunstein, Pierre
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p. 5955 - 5964
(2017/07/10)
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- METHOD OF PREPARING NOVEL LIGAND COMPOUND AND TRANSITION METAL COMPOUND
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The present invention relates to a method for preparing a novel ligand compound and a transition metal compound. According to the present invention, a novel ligand compound and a transition metal compound can be obtained with high yield through a simple method. Also, the transition metal compound has high comonomer incorporation in the process of manufacturing an olefin-based polymer, thereby being used as a catalyst for polymerization.COPYRIGHT KIPO 2017
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Paragraph 0284; 0285
(2017/12/27)
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- Metal-to-ligand alkyl migration inducing carbon-sulfur bond cleavage in dialkyl yttrium complexes supported by thiazole-containing amidopyridinate ligands: Synthesis, characterization, and catalytic activity in the intramolecular hydroamination reaction
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Neutral YIII dialkyl complexes supported by tridentate N -,N,N monoanionic methylthiazole- or benzothiazole-amidopyridinate ligands have been prepared and completely characterized. Studies on their stability in solution revealed prog
- Lyubov, Dmitry M.,Luconi, Lapo,Rossin, Andrea,Tuci, Giulia,Cherkasov, Anton V.,Fukin, Georgy K.,Giambastiani, Giuliano,Trifonov, Alexander A.
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p. 3487 - 3499
(2014/04/03)
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- HIGH ACTIVITY, LOW MOLECULAR WEIGHT OLEFIN POLYMERIZATION PROCESS
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Group 4 metal complexes comprising a polyvalent, heteroaryl donor ligand and their use as components of olefin polymerization catalysts, especially suited for preparing propylene/ethylene copolymer products having high isotacticity and low molecular weigh
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Page/Page column 30
(2010/11/26)
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- Oligomerisation of ethylene to linear α-olefins by tetrahedral cobalt(II) precursors stabilised by benzo[b]thiophen-2-yl-substituted (imino)pyridine ligands
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On activation by MAO, 2-(imino)pyridine cobalt dichlorides bearing a benzo[ b ]thiophen-2-yl substituent in the 6-position of the pyridine ring oligomerise ethylene to α-olefins with turn-over-frequencies as high as 1.5 × 106 mol of C2H4 converted (mol of Co × h)-1 and productivities as high as 3769 kg of oligomers (mol of Co × h × bar)-1. Aldimine precursors are more active than ketimine analogues, yet ketimines give higher molecular weight oligomers.
- Bianchini, Claudio,Giambastiani, Giuliano,Mantovani, Giuseppe,Meli, Andrea,Mimeau, David
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p. 1356 - 1361
(2007/10/03)
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