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Chelated bis(NHC) complexes of saturated (imidazolin-2-ylidene) NHC ligands: structural authentication and facile ligand fragmentation

Gardiner, MG ORCID: 0000-0001-6373-4253, McGuinness, DS ORCID: 0000-0002-6615-7807 and Vanston, CR 2017 , 'Chelated bis(NHC) complexes of saturated (imidazolin-2-ylidene) NHC ligands: structural authentication and facile ligand fragmentation' , Dalton Transactions, vol. 46, no. 9 , 3051–3058 , doi: 10.1039/C7DT00327G.

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Abstract

The CH2-linked bis(NHC) complexes [{(SMesIm)2CH2}PdBr2] and [{(SMesIm)2CH2}Pd(NCMe)2][PF6]2 are reported. These represent the first structurally characterized chelated, saturated bis(NHC) complexes. The complexes are subject to facile ligand fragmentation during their synthesis. Longer (CH2)n-linkers in the imidazolin-2-ylidene-based series of ligands afforded the pendant imidazolinium mono(NHC) complexes [{(SMesImH)(SMesIm)(CH2)n}PdBr3] by reaction of the diimidazolinium salts (n = 2, 3) with palladium acetate. These did not react to give the bis(NHC) complexes, as was the case for [{(SMesImH)(SMesIm)CH2}PdX3] (X = Br, I). Disilver(I) complexes [{(SMesIm)2(CH2)n}2Ag2][PF6]2n = 1 and 3, were also prepared.

Item Type: Article
Authors/Creators:Gardiner, MG and McGuinness, DS and Vanston, CR
Journal or Publication Title: Dalton Transactions
Publisher: Royal Soc Chemistry
ISSN: 1477-9226
DOI / ID Number: 10.1039/C7DT00327G
Copyright Information:

Copyright 2017 The Royal Society of Chemistry

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