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Study on kinetics and mechanism of copper‐catalyzed oxidation of hydrazine by iron (III) in acid solution
Author(s) -
DePing Cheng,
ShiJun Xia
Publication year - 1996
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19960140109
Subject(s) - chemistry , hydrazine (antidepressant) , copper , catalysis , hydrolysis , kinetics , reaction rate constant , inorganic chemistry , medicinal chemistry , nuclear chemistry , organic chemistry , chromatography , physics , quantum mechanics
Abstract The copper‐catalyzed oxidation of hydrazine by iron(III) in acid solution follows the rate law ‐d[Fe(III)]/dt = kK h [Cu(II)] 2 /( K h + [H + ]), where K h is the hydrolysis constant of Cu 2+ , k was found to be 8.8±0.8, 13.2±1.4 and 17.5±1.3 min −1 at 35, 40, and 45°C respectively and μ= 0.2 mol/L. The composition of the activated complex is Cu 2+ , CuOH + , N 2 H 4 , H + or others. Perhaps several hydrazine complexes of Cu(II) participate in the reaction and one of them isolated was Cu(N 2 H 4 ) 2 (HSO 4 ) 2 . Study on the oxidation of this complex is also in conformity with the above rate law.