Results 221 to 230 of about 13,617,516 (263)

Planar tris-N-heterocyclic carbenes

Chemical Communications, 2013
To further explore the coordination chemistry of poly-carbene complexes, two triphenylene-based planar tridentate N-heterocyclic carbenes and their corresponding tri-gold complexes were synthesized. Molecular structures of the tert-butyl substituted tritopic free carbene and the tri-nuclear gold complex were determined experimentally.
Yun-Ting, Wang, Meng-Ting, Chang, Gene-Hsiang, Lee, Shie-Ming, Peng, Ching-Wen, Chiu   +4 more
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The Chemistry of Functionalized N‐Heterocyclic Carbenes

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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N-Heterocyclic carbenes in gold catalysis

Chemical Society Reviews, 2008
The appealing properties of N-heterocyclic carbenes (NHC) as ancillary ligands and the high potential of gold as an organometallic catalyst have made their encounter inevitable. Still in its infancy, NHC-gold catalysis is nevertheless growing rapidly.
Nicolas, Marion, Steven P, Nolan
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SILVER(I) N-HETEROCYCLIC CARBENES

Comments on Inorganic Chemistry, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ivan J. B. Lin, Chandra Sekhar Vasam
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N-Heterocyclic Carbenes in FLP Chemistry

2012
The use of N-heterocyclic carbenes (NHCs) for the design and construction of frustrated Lewis pairs (FLPs) is outlined in this review. Stable carbene-borane adducts are briefly discussed, followed by a detailed survey of the reactivity of NHCs, in particular Arduengo-type imidazolin-2-ylidenes, towards B(C6F5)3.
Eugene L, Kolychev, Eileen, Theuergarten, Matthias, Tamm   +2 more
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A Stable N-Heterocyclic Carbene with a Diboron Backbone

Journal of the American Chemical Society, 2005
The synthesis of a novel five-membered inorganic ring, a stable N-heterocyclic carbene with a diboron backbone, is reported. A pentacarbonyltungsten complex containing the new carbene is also described. Spectroscopic evidence indicates that the sterically encumbered carbene is a better sigma-donor than classical N-heterocyclic analogues, demonstrating ...
Krahulic, Kelly E., Enright, Gary D., Parvez, Masood, Roesler, Roland   +3 more
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Synthesis of N -heterocyclic carbene boranes via silver N -heterocyclic carbene complexes

Polyhedron, 2017
Abstract The reaction of N-heterocyclic carbene (NHC) complexes of silver with BH3 or BEt3 was investigated. On treatment of IiPr·AgCl (1-AgCl) (IiPr = 1,3-diisopropylimidazol-2-ylidene) with two equivalents of NaBH4-free BH3·THF (purified BH3·THF) in THF at room temperature for 2 h, IiPr·BH3 complex (1-BH3) was obtained in excellent yield (96%).
Shintaro Ono, Takashi Watanabe, Yosuke Nakamura, Hiroyasu Sato, Toru Hashimoto, Yoshitaka Yamaguchi   +5 more
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Homoleptic Crown N‐Heterocyclic Carbene Complexes

Angewandte Chemie International Edition, 2007
The first metal N-heterocyclic carbene complexes derived from a cyclic tetraimidazolium salt show a remarkable versatility of ligand conformation and coordination geometry. With PdII, a mononuclear square-planar complex is obtained, but with CuI and AgI, an unprecedented dinuclear motif with a short metal–metal interaction is observed (see structure; N 
McKie, Ross, Murphy, J.A., Park, S.R., Spicer, M.D., Zhou, S.   +4 more
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Is the term “Carbene” justified for remote N-heterocyclic carbenes (r-NHCs) and abnormal N-heterocyclic carbenes (aNHCs/MICs)?

Tetrahedron, 2019
Abstract The spatial magnetic properties, through-space NMR shieldings (TSNMRS), of typical N-heterocyclic carbenes NHCs, r-NHCs, a-NHCs and MICs have been calculated using the GIAO perturbation method employing the nucleus independent chemical shift (NICS) concept and visualized as iso-chemical-shielding surfaces (ICSS) of various size and direction.
Kleinpeter, Erich (Prof. Dr.), Koch, Andreas (Dr.)   +1 more
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N‐Heterocyclic Carbenes in Synthesis

, 2006
N-heterocyclic carbenes (NHCs) are a valuable and multi-purpose tool with a broad spectrum of applications in modern synthetic organic chemistry. This first hanbook to focus solely on such applications covers metathesis, organocatalysis, oxidation and ...
Marko, Istvan, Berthon, Guillaume
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