Single-site homogeneous and heterogeneized gold(III) hydrogenation catalysts: Mechanistic implications

Aleix Comas-Vives, C. González-Arellano, A. Corma, M. Iglesias, F. Sánchez, Gregori Ujaque

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130 Citations (Scopus)

Abstract

Au(III)-Schiff base complexes are active hydrogenation catalysts, giving turnover frequencies similar to those of the corresponding complexes of Pd(II), which has the same d8 electronic structure as Au(III). The mechanism of the reaction has been studied in detail by a combination of kinetic experiments and theoretical calculations. It is predicted and tested that the nature of the solvent plays a critical role for the heterolytic cleavage of H2 (controlling step). Taking this into account, and by properly selecting the nature of solid supports (polarity and proton-donating ability), it was possible to strongly increase the activity of the homogeneous Au(III) and Pd(II) catalysts by grafting them onto the surface. © 2006 American Chemical Society.
Original languageEnglish
Pages (from-to)4756-4765
JournalJournal of the American Chemical Society
Volume128
Issue number14
DOIs
Publication statusPublished - 12 Apr 2006

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