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Kinetic Studies of Catalyzed Chromic Acid Oxidation of Propionaldehyde by Picolinic Acid
Author(s) -
Lin TzuenYeuan
Publication year - 1981
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198100004
Subject(s) - chemistry , propionaldehyde , picolinic acid , chromic acid , catalysis , acetaldehyde , decomposition , aldehyde , photochemistry , medicinal chemistry , inorganic chemistry , organic chemistry , ethanol
The chromic acid oxidation of propionaldehyde in the presence of picoIinic acid proceeds much faster than that of propionaldehyde alone. It is shown that picolinic acid is an effective catalyst. The rate law governing this catalysis is rate= k [HCrO 4 − ][PA]‐[CH 3 CH 2 CHO][H + ] 2 /(a+b[H + ]+ c [H + ] 2 ). A mechanism consistent with the rate law was proposed: picolinic acid reacts with chromic acid to form a cyclic intermediate complex C 1 , C 1 further reacts with a molecule of hydrated aldehyde to give a termolecular complex C 2 and a hydrogen ion, C 2 then undergoes oxidative decomposition in the next step to give products.