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Solution pH: A Selectivity Switch in Aqueous Organometallic Catalysis—Hydrogenation of Unsaturated Aldehydes Catalyzed by Sulfonatophenylphosphane–Ru Complexes
Author(s) -
Joó Ferenc,
Kovács József,
Bényei Attila Cs.,
Kathó Ágnes
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19980420)37:7<969::aid-anie969>3.0.co;2-9
Subject(s) - cinnamaldehyde , selectivity , catalysis , ruthenium , chemistry , aqueous solution , catalytic hydrogenation , inorganic chemistry , organic chemistry
The equilibribrium distribution of water‐soluble ruthenium hydrides [HRuCl(tppms) 3 ] and [H 2 Ru(tppms) 4 ] (tppms = (3‐sulfonatophenyl)diphenylphosphane) in the reaction with H 2 is governed by the pH value. As a consequence, the selectivity in the hydrogenation of cinnamaldehyde for reaction at C=C or C=O can be completely inverted by changing the pH value (see drawing below).