http://dx.doi.org/10.1016/j.jorganchem.2013.05.020">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Bulky N-heterocyclic carbene and pyridine donor adducts of Co(II) bromide: Influence on reactivity of stoichiometry, sterics and donor capability

Language

English

Abstract

The reactivity of cobalt dibromide with the bulky N-heterocyclic carbenes IMes and IPr has been explored [IMes = N,N0-bis(2,4,6-trimethylphenyl)imidazol- 2-ylidene; IPr = N,N0-bis(2,6-diisopropylphenyl)imidazol-2-ylidene], with the aim of generating synthetically versatile complexes of the types (NHC)CoBr 2 and (NHC)2CoBr2. Differences between the two carbene systems illustrate the key role of ligand sterics in this synthetic approach, while the importance of donor strength is emphasized by comparative studies with the related sterically encumbered pyridine ligand 2,6-Mes 2py. Thus, IMes and IPr are differentiated by the inability of the latter, bulkier, donor to form a 2:1 adduct, while 2,6-Mes2py gives rise to CoeN bonds only in the presence of a suitable halide abstraction agent.© 2013 Elsevier B.V. All rights reserved.

Keywords

Bulky ligands, Cobalt, N-Heterocyclic carbine, Pyridine

Publication Date

2013

Source Publication Title

Journal of Organometallic Chemistry

Volume

741-742

Start Page

33

End Page

39

Publisher

Elsevier

ISSN (print)

0022328X

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