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Selective and adaptable access to N,N'-asymmetrically substituted imidazol-2-ylidene bis-NHC ligands: Pd(II) complexes featuring wide variation in N-alkyl and aryl steric bulk

Citation

Gardiner, MG and Ho, CC and Mackay, FM and McGuinness, DS and Tucker, M, Selective and adaptable access to N,N'-asymmetrically substituted imidazol-2-ylidene bis-NHC ligands: Pd(II) complexes featuring wide variation in N-alkyl and aryl steric bulk, Dalton Transactions, 42, (20) pp. 7447-7457. ISSN 1477-9226 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Dalton Transactions

DOI: doi:10.1039/c3dt32895c

Abstract

N,N'-Asymmetrically substituted, methylene-linked bis(imidazol-2-ylidene) complexes have been prepared subsequent to a selective synthesis of the bis(imidazolium) salt precursors involving the quarternisation of N-alkyl and -aryl imidazoles with N-halomethyl imidazolium salts. The adaptability of the ligand precursor synthesis is illustrated through access to the N-Me/N'-Mes and N-Mes/N'-2,6-(i-Pr)2Ph systems, leading to the Pd(ii) complexes [{(MeIm)(MesIm)CH2}Pd(L)2]n+, L = Cl/I (n = 0) and NCMe (n = 2), and [{(MesIm)[2,6-(i-Pr)2PhIm]CH2}Pd(L)2], L = Cl/I. The dicationic hybrid N,N'-alkyl/aryl complex was inactive in the copolymerisation of ethylene/carbon monoxide, displaying reactivity akin to N,N'-dialkyl analogues.

Item Details

Item Type:Refereed Article
Keywords:catalysis, organometallic, structure, synthesis
Research Division:Chemical Sciences
Research Group:Inorganic Chemistry
Research Field:Transition Metal Chemistry
Objective Division:Manufacturing
Objective Group:Industrial Chemicals and Related Products
Objective Field:Inorganic Industrial Chemicals
Author:Gardiner, MG (Associate Professor Michael Gardiner)
Author:Ho, CC (Dr Curtis Ho)
Author:Mackay, FM (Ms Felicity Mackay)
Author:McGuinness, DS (Dr David McGuinness)
Author:Tucker, M (Mr Matthew Tucker)
ID Code:89114
Year Published:2013
Funding Support:Australian Research Council (DP120101540)
Web of Science® Times Cited:8
Deposited By:Chemistry
Deposited On:2014-02-25
Last Modified:2017-10-25
Downloads:0

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