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Reaction of CO with a Methylpalladium Heterocyclic Carbene Complex: Product Decomposition Routes - Implications for Catalytic Carbonylation Processes

journal contribution
posted on 2023-05-16, 12:20 authored by McGuinness, DS, Cavell, KJ
The methylpalladium-heterocyclic carbene dimer [PdMe(tmiy)(μ-Cl]2 (1) (tmiy = 1,3,4,5-tetramethylimidazolin-2-ylidene) reacts with CO to yield [PdMeCl(tmiy)CO] (2) through cleavage of the Cl bridge. Complex 2 decomposes in solution to yield the 1,2,3,4,5-pentamethylimidazolium ion (I) along with a small amount of 2-acyl-1,3,4,5-tetramethylimidazolium (II). In the presence of AgBF4 the dimer reacts with CO to give II as the major product. The reaction sequence is interpreted as evidence for CO insertion into the Pd-Me bond of 2 and also represents a possible mode of deactivation for potential CO/ethylene copolymerization catalysts based on heterocylic carbene complexes.

History

Publication title

Organometallics

Volume

19

Issue

23

Pagination

4918-4920

ISSN

0276-7333

Department/School

School of Natural Sciences

Publisher

American Chemical Society

Place of publication

USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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