Issue 34, 2017

Heteroleptic nickel(ii)–diNHC complexes and an unusual ‘reverse’ carbene-transfer reaction to silver(i)

Abstract

A series of rare [NiX2(MeCCprop)] complexes bearing the cis-chelating benzimidazole-derived dicarbene ligand MeCCprop and varying anionic coligands (2, X = N3; 3, X = NCS; 4, X = I; 5, X = O2CCF3) have been prepared and coligand dependent structural and spectroscopic features have been evaluated. This study also revealed an unusual ‘reverse’ carbene transfer reaction from nickel to silver giving the disilver species [Ag2X2(μ–κ2-MeCCprop)] (6, X = OAc; 7, X = O2CCF3). A preliminary catalytic study of two representative NiII diNHC complexes in the aqueous and phosphine-free Suzuki–Miyaura coupling reaction of aryl halides is reported as well. These reactions provide good yields of coupling products, but do not require inert conditions.

Graphical abstract: Heteroleptic nickel(ii)–diNHC complexes and an unusual ‘reverse’ carbene-transfer reaction to silver(i)

Supplementary files

Article information

Article type
Paper
Submitted
26 May 2017
Accepted
01 Aug 2017
First published
01 Aug 2017
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2017,46, 11318-11326

Heteroleptic nickel(II)–diNHC complexes and an unusual ‘reverse’ carbene-transfer reaction to silver(I)

H. V. Huynh, C. H. M. Koh and V. H. Nguyen, Dalton Trans., 2017, 46, 11318 DOI: 10.1039/C7DT01912B

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