Please use this identifier to cite or link to this item:
https://doi.org/10.1039/b815876b
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. https://doi.org/10.1039/b815876b | 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 | URI: | http://scholarbank.nus.edu.sg/handle/10635/93828 | 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.
SCOPUSTM
Citations
1
checked on Feb 24, 2021
WEB OF SCIENCETM
Citations
32
checked on Feb 24, 2021
Page view(s)
65
checked on Feb 28, 2021
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.