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Does the rate of competing isomerisation during alkene metathesis depend on pre-catalyst initiation rate?
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2014 Mar 28; Vol. 43 (12), pp. 4674-9. - Publication Year :
- 2014
-
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.
- Subjects :
- Catalysis
Isomerism
Alkenes chemistry
Phosphines chemistry
Ruthenium chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 43
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 24488325
- Full Text :
- https://doi.org/10.1039/c4dt00007b