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A Parahydrogen Study of Catalytic Hydrogenation by Diphosphane-Substituted Triruthenium Clusters

✍ Scribed by Tom G. Prestwich; Damir Blazina; Simon B. Duckett; Paul J. Dyson

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
141 KB
Volume
2004
Category
Article
ISSN
1434-1948

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✦ Synopsis

Abstract

The diphosphane‐substituted clusters [Ru~3~(CO)~10~(dppe)] and [Ru~3~(CO)~8~(dppe)~2~] [dppe = 1,2‐bis(diphenylphosphanyl)ethane] are shown to catalytically hydrogenate diphenylacetylene. This process is highly solvent‐dependent with fragmentation dominating in low‐polarity solvents, which indicates that the dppe ligand does not stabilise the cluster under catalytic conditions. In solvents of higher polarity, the clusters are active hydrogenation catalysts of lower activity than their monodentate phosphane analogues [Ru~3~(CO)~10~(L)~2~] (L = PPh~3~, PMe~2~Ph, PMe~3~, PCy~3~). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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