Results 101 to 110 of about 13,617,516 (263)
N‐Heterocyclic Carbene Analogues of Wittig Hydrocarbon
Chemistry – A European JournalAbstractN‐Heterocyclic carbene (NHC) analogues of Wittig hydrocarbon, [(NHC)(Stil)(NHC)] (3a‐c) (NHC = SIPr (1a) = C[N(Dipp)CH2]2, Dipp = 2,6‐iPr2C6H3; IPr (1b) = C[N(Dipp)CH]2; Me‐IPr (1c) = C[N(Dipp)CMe]2 and Stil = C6H4CHCHC6H4) have been reported as crystalline solids.
Henric Steffenfauseweh +5 more
openaire +4 more sources
Catalytic construction of non-carbon stereocenters by N-heterocyclic carbenes
Discover ChemistryChirality is widely present in natural products, pharmaceutical compounds, and functional molecules. N-heterocyclic carbene (NHC) catalysis has emerged as a pivotal strategy for constructing stereocenters, leveraging its strong σ-donating capability and ...
Xiaoqing Lai +5 more
doaj +1 more source
Half-sandwich nickel(II) complexes bearing 1,3-di(cycloalkyl)imidazol-2-ylidene ligands
Beilstein Journal of Organic Chemistry, 2015 Two new nickel catalysts have been prepared using a convenient procedure where nickelocene, the NHC·HBF4 salts, and [Et4N]Cl were heated in THF using microwave irradiation. The resulting [NiCl(Cp)(NHC)] complexes are air- and moisture stable in the solid
Johnathon Yau +4 more
doaj +1 more source
Ligand Properties of N-Heterocyclic and Bertrand Carbenes: A Density Functional Study
, 2012 [[abstract]]In order to probe the ligand properties we have examined a series of Cr(CO)5L and Ni(CO)3L complexes using density functional theory (DFT). The ligands included in our study are N-heterocyclic carbenes (NHCs) and Bertrand-type carbenes.
Lai, C. L. ; Guo, W. H. ; Lee, M. T. ; Hu, Ching-Han
core
Nickel(II) Complexes of N-Heterocyclic Carbenes†
, 2016 Nickel(II) complexes with N-heterocyclic carbenes are accessible through substitution of triphenylphosphine in NiX2(PPh3)2 (X = Cl, Br) by the free carbenes or by in situ deprotonation of the corresponding azolium salts with Ni(OAc)2 as the starting ...
Wolfgang A. Herrmann (1392130) +2 more
core +1 more source
Silver N-heterocyclic carbenes
, 2011 Silver(I) NHC complexes are widely interested class of compounds due to their transmetallation and medicinel abilities. In contrast to other metalles, silver(I) NHCs are stable toward oxygen and moisture of the air.In this dissertation our main aim is to synthesis new kinds of silver(I) NHCs and to test them for their catalytic abilities.
openaire +2 more sources
Proton Affinities of Phosphines versus N-Heterocyclic Carbenes
, 2016 The gas-phase proton affinities of unusually basic phosphines and N-heterocyclic carbenes are compared and contrasted both computationally and ...
Ill Yang (2254483) +3 more
core +1 more source
Synthesis of Chiral Bifunctional (Thio)Urea N-Heterocyclic Carbenes [PDF]
The rapid and modular synthesis of the first bifunctional N-heterocyclic carbenes bearing a (thio)urea moiety as H-bond donor group was reported. Different analogues could be accessed in seven steps from cheap (S)-pyroglutamic acid in good overall yields
Osuna-Siles, José Ignacio +2 more
core +2 more sources
Carbon and Hydrogen, EarlyView.This review systematically summarizes research progress on bismuth‐based semiconductor photocatalytic materials in the field of CO2 reduction. It focuses on elucidating the mechanisms by which four modification strategies—including heteroatom doping, oxygen vacancy engineering, microstructural control, and heterostructure fabrication—regulate band ...
Shuisen He +6 more
wiley +1 more source
Dimerisation, rhodium complex formation and rearrangements of N-heterocyclic carbenes of indazoles
Beilstein Journal of Organic Chemistry, 2014 Deprotonation of indazolium salts at low temperatures gives N-heterocyclic carbenes of indazoles (indazol-3-ylidenes) which can be trapped as rhodium complexes (X-ray analysis).
Zong Guan +4 more
doaj +1 more source