Issue 31, 2013

A detailed kinetic analysis of rhodium-catalyzed alkyne hydrogenation

Abstract

Continuous monitoring using electrospray ionisation mass spectrometry (ESI-MS) shows that Wilkinson's catalyst hydrogenates a charge-tagged alkyne to the corresponding alkene, and at only a marginally slower rate, to the alkane. No rhodium-containing intermediates were observed during the reaction, consistent with the established mechanism which points at the initial dissociation of triphenylphosphine from Rh(PPh3)3Cl as being the key step in the reaction. A numerical model was constructed that the closely matched the experimental data, and correctly predicted the response of the reaction to the addition of excess PPh3.

Graphical abstract: A detailed kinetic analysis of rhodium-catalyzed alkyne hydrogenation

Supplementary files

Article information

Article type
Paper
Submitted
08 May 2013
Accepted
18 Jun 2013
First published
20 Jun 2013
This article is Open Access
Creative Commons BY license

Dalton Trans., 2013,42, 11312-11318

A detailed kinetic analysis of rhodium-catalyzed alkyne hydrogenation

J. Luo, A. G. Oliver and J. Scott McIndoe, Dalton Trans., 2013, 42, 11312 DOI: 10.1039/C3DT51212F

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