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Arene Hydrogenation with a Stabilised Aqueous Rhodium(0) Suspension: A Major Effect of the Surfactant Counter‐Anion
Author(s) -
Roucoux Alain,
Schulz Jürgen,
Patin Henri
Publication year - 2003
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.200390016
Subject(s) - chemistry , rhodium , sodium borohydride , catalysis , aqueous solution , ammonium chloride , benzene , inorganic chemistry , pulmonary surfactant , chloride , ammonium , colloid , hydrogen , nuclear chemistry , organic chemistry , medicinal chemistry , biochemistry
A reduced aqueous colloidal suspension of rhodium shows an efficient activity in the catalytic hydrogenation of various benzene derivatives under biphasic conditions at room temperature and under atmospheric hydrogen pressure. The rhodium nanoparticles in the size range of 2–2.5 nm have been synthesised by reducing RhCl 3 ⋅3 H 2 O with sodium borohydride and were stabilised by highly water‐soluble N , N ‐dimethyl ‐N‐ cetyl‐ N ‐(2‐hydroxyethyl)ammonium salts (HEA16X, X=Br, Cl, I, CH 3 SO 3 , BF 4 ). The major influence of the counter‐ion of these surfactants on catalytic activity and recycling is described. The best results have been obtained with chloride ammonium salts HEA16Cl.