Please use this identifier to cite or link to this item:
Title: Formation and crystallographic elucidation of stable [4 + 2]-coordinate nickel(ii) N,S-heterocyclic carbene (NSHC) complexes
Authors: Ding, N.
Zhang, J. 
Hor, T.S.A. 
Issue Date: 2009
Citation: Ding, N., Zhang, J., Hor, T.S.A. (2009). Formation and crystallographic elucidation of stable [4 + 2]-coordinate nickel(ii) N,S-heterocyclic carbene (NSHC) complexes. Dalton Transactions (10) : 1853-1858. ScholarBank@NUS Repository.
Abstract: A series of square-planar N,S-heterocyclic carbene (NSHC) complexes trans-[NiX2(N-RBzTh)2] (BzTh = benzothiazolin-2-ylidene) (R/X = Bz/Br; Me/I; Et/I; Pri/I; Bui/I) have been synthesized and characterized by X-ray single-crystal diffraction analysis. These are the first crystallographically established NSHC complexes of nickel in the literature. The N,S-heterocyclic carbene (NSHC) rings invariably twist away from co-planarity with the metal coordination plane such that the N-substituent moves on top and below the metal to facilitate electrostatic γ-hydride interaction, thus giving an essentially [4 + 2] coordination at the Ni(ii) center. These compounds are active toward reductive Ullmann-type coupling reactions in Bu4NBr showing higher activities towards bromoanisole or bromotoluene than bromobenzene. The complex trans-[NiI2(N-Pr iBzTh)2] with the shortest Ni⋯H anagostic separation and a near-ideal orthogonal orientation between the carbene and metal planes gives the highest yields. © 2009 The Royal Society of Chemistry.
Source Title: Dalton Transactions
ISSN: 14779226
DOI: 10.1039/b815876b
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Feb 24, 2021


checked on Feb 24, 2021

Page view(s)

checked on Feb 28, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.