A detailed kinetic analysis of rhodium-catalyzed alkyne hydrogenation

Date

2013

Authors

Luo, Jingwei
Oliver, Allen G.
McIndoe, J. Scott

Journal Title

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Publisher

Dalton Transactions

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.

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Citation

Luo, J., Oliver, A. G., & McIndoe, J. S. (2013). A detailed kinetic analysis of rhodium-catalyzed alkyne hydrogenation. Dalton Transactions, 42(31). https://doi.org/10.1039/c3dt51212f