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Air and moisture tolerant synthesis of a chelated bis(NHC) methylpalladium(II) complex relevant to alkyl migration processes in catalysis

Citation

Gardiner, MG and Ho, CC and McGuinness, DS and Liu, YL, Air and moisture tolerant synthesis of a chelated bis(NHC) methylpalladium(II) complex relevant to alkyl migration processes in catalysis, Australian Journal of Chemistry, 73 pp. 1158-1164. ISSN 0004-9425 (2020) [Refereed Article]


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DOI: doi:10.1071/CH20194

Abstract

Abstract

An air- and moisture-tolerant alternate synthetic pathway to the preparation of a cationic chelated bis(NHC) methylpalladium(ii) complex, [{(MesIm)2CH2}Pd(Me)(NCMe)][PF6], is described. The pathway involves the isolation of a bis(NHC) AgI complex, [{(MesIm)2CH2}2Ag2][PF6]2, via metallation of the corresponding diimidazolium salt with Ag2O followed by carbene transfer to [(COD)PdBrMe]. This new method avoids a previously reported unstable intermediate that displayed rapid decomposition at room temperature, attaining the targeted cationic methylpalladium(ii) complex in high yield. CO/ethylene copolymerisation catalysis trials are reported showing solvent dependent catalyst lifetime and copolymer yields. Preliminary ethylene insertion studies are also outlined revealing possible pathways leading towards catalyst deactivation.

Item Details

Item Type:Refereed Article
Keywords:palladium, catalysis, NHC, copolymerisation
Research Division:Chemical Sciences
Research Group:Inorganic chemistry
Research Field:Organometallic chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Gardiner, MG (Associate Professor Michael Gardiner)
UTAS Author:Ho, CC (Dr Curtis Ho)
UTAS Author:McGuinness, DS (Dr David McGuinness)
ID Code:147336
Year Published:2020
Deposited By:Chemistry
Deposited On:2021-10-27
Last Modified:2021-11-08
Downloads:0

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