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Structure and Base Catalysis of Supercritical Water in the Noncatalytic Benzaldehyde Disproportionation Using Water at High Temperatures and Pressures
Author(s) -
Ikushima Yutaka,
Hatakeda Kiyotaka,
Sato Osamu,
Yokoyama Toshirou,
Arai Masahiko
Publication year - 2001
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 - 10.1002/1521-3773(20010105)40:1<210::aid-anie210>3.0.co;2-7
Subject(s) - disproportionation , benzaldehyde , supercritical fluid , chemistry , catalysis , aqueous solution , supercritical water oxidation , base (topology) , inorganic chemistry , organic chemistry , mathematical analysis , mathematics
Catalyst and reaction medium in one : that is the dual role of supercritical water (scH 2 O) in the disproportionation of benzaldehyde. In the near‐critical region the reaction rates ( k p2 ) are significantly greater than those found in water and aqueous NaOH (see picture, values for scH 2 O and water are at 25 MPa), also unequivocal chemical evidence for the participation of the OH − ion, not the OH . radical, is obtained.