Half-sandwich nickel complexes with ring-expanded NHC ligands – synthesis, structure and catalytic activity in Kumada–Tamao–Corriu coupling

Łukasz Banach , Piotr Guńka , Włodzimierz Buchowicz

Abstract

The general synthesis of [Ni(Cp)(X)(NHC)] complexes from a nickel halide, CpLi, and a carbene solution is reported. This procedure yields unprecedented complexes with ring-expanded NHC ligands (RE-NHC) of six- (1a, 1b), seven- (1c), and eight-membered (1d) heterocycles. The NMR spectra of 1a–1d are consistent with the hindered rotation of Ni–Ccarbene and N–CMes bonds, while X-ray analyses of 1b, 1c, and 1d reveal a pronounced trans influence of the RE-NHC ligands. Complexes 1a–1e are efficient pre-catalysts in Kumada–Tamao–Corriu coupling with the maximum efficiency observed for complexes bearing the six-membered NHC.
Author Łukasz Banach ZKChM
Łukasz Banach,,
- Department Of Catalysis And Organometallic Chemistry
, Piotr Guńka KChNTCS
Piotr Guńka,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Włodzimierz Buchowicz ZKChM
Włodzimierz Buchowicz,,
- Department Of Catalysis And Organometallic Chemistry
Journal seriesDalton Transactions: the international journal for inorganic, organometallic and bioinorganic chemistry , ISSN 1477-9226
Issue year2016
Vol45
No21
Pages8688-8692
DOIDOI:10.1039/C5DT04663G
URL http://pubs.rsc.org/en/Content/ArticleLanding/2016/DT/C5DT04663G#!divAbstract
Languageen angielski
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c5dt04663g.pdf (file archived - login or check accessibility on faculty) c5dt04663g.pdf 3.07 MB
Score (nominal)40
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.029 (2) - 2016=3.851 (5)
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