Issue 5, 2006

Hydrogenation of citral in supercritical CO2 using a heterogeneous Ni(ii) catalyst

Abstract

Ni(II)-catalyzed hydrogenation of citral in supercritical carbon dioxide (scCO2) results in the selective hydrogenation of C[double bond, length as m-dash]O over C[double bond, length as m-dash]C. The catalyst is completely inactive in conventional organic solvents. However, in presence of small amounts of CO2 in the organic solvent, the catalyst become active to the citral hydrogenation. Theoretical calculations and spectroscopic studies suggest the probability of the formation of a complex between CO2 and Ni(II) during the reaction. This, along with unique physical properties of scCO2, may be an important factor in directing the activity and selectivity of the reaction.

Graphical abstract: Hydrogenation of citral in supercritical CO2 using a heterogeneous Ni(ii) catalyst

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2005
Accepted
22 Feb 2006
First published
20 Mar 2006

Green Chem., 2006,8, 445-449

Hydrogenation of citral in supercritical CO2 using a heterogeneous Ni(II) catalyst

M. Chatterjee, A. Chatterjee, P. Raveendran and Y. Ikushima, Green Chem., 2006, 8, 445 DOI: 10.1039/B517440F

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