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Detection of intermediates in cobalt-catalyzed hydroformylation using para-hydrogen-induced polarization

Godard, C., Duckett, S.B., Polas, S., Tooze, R. and Whitwood, A.C. (2005) Detection of intermediates in cobalt-catalyzed hydroformylation using para-hydrogen-induced polarization. Journal of the American Chemical Society, 127 (14). pp. 4994-4995. ISSN 0002-7863

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Abstract

para-Hydrogen-induced polarization methods are shown to enable the in situ detection of linear and branched monophosphine-containing intermediates during hydroformylation when Co(η3-C3H5)(CO)2(PCy3) is the catalyst precursor. The NMR signal characteristics of the alkyl arms of these species provide direct evidence for the rapid interconversion of linear and branched cobalt alkyls prior to the CO insertion step. The observation of additional para-hydrogen-enhanced signals for the corresponding linear and branched aldehydes enables the reactions selectivity to be rapidly monitored as a function of H2 and CO pressure or reaction temperature.

Item Type: Article
Academic Units: The University of York > Chemistry (York)
Depositing User: York RAE Import
Date Deposited: 08 Apr 2009 11:34
Last Modified: 08 Apr 2009 11:34
Published Version: http://dx.doi.org/10.1021/ja0434533
Status: Published
Publisher: ACS American Chemical Society
Identification Number: 10.1021/ja0434533
URI: http://eprints.whiterose.ac.uk/id/eprint/6876

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