Does the rate of competing isomerisation during alkene metathesis depend on pre-catalyst initiation rate?

D.J. Nelson, J.M. Percy

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Experimental studies of the ring-closing metathesis reaction of 1,8-nonadiene and the ROMP reaction of cycloheptene show that the rate of isomerisation is not correlated to the initiation rate of the pre-catalyst, and that the absence of phosphine leads to a greatly increased rate of isomerisation. A range of pre-catalysts and solvents were probed and it is proposed that the isomerisation is mediated by a ruthenium hydride complex; our results are consistent with the rate-determining formation of such a species, which might be trapped in situ by tricyclohexylphosphane.
Original languageEnglish
Pages (from-to)4674-4679
Number of pages6
JournalDalton Transactions
Volume43
Issue number12
Early online date28 Jan 2014
DOIs
Publication statusPublished - 28 Mar 2014

Keywords

  • ring-closing metathesis reaction
  • cycloheptene
  • solvents

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