Results 221 to 230 of about 8,786 (262)

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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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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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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N‐Heterocyclic Carbenes in Synthesis [PDF]

, 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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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 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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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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Abnormal N-heterocyclic carbenes

Coordination Chemistry Reviews, 2007
Abstract Metal NHC complexes have been known for over 50 years, but only during the last 15 have they been studied as potential catalysts. N-heterocyclic carbene (NHC) complexes are often more straightforward to make than the phosphine analogues with which they are often compared, are generally more stable, less odorous and on many occasions have ...
Polly L. Arnold, Stephen Pearson
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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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