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Kinetics of reduction of chloramines by sodium borohydride
Author(s) -
Duriche Cécile,
Darwich Chaza,
Elkhatib Mazen,
Tabcheh Mohamad,
Delalu Henri
Publication year - 2002
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.504
Subject(s) - chemistry , sodium borohydride , chloramine , kinetics , enthalpy , chloramine t , catalysis , octane , inorganic chemistry , chlorine , organic chemistry , thermodynamics , physics , quantum mechanics
The reduction of chloramine, methylchloramine, dimethylchloramine and N ‐chloro‐3‐azabicyclo[3.3.0]octane by sodium borohydride was studied according to pH, temperature and concentrations of haloamine and reducing agent. The interaction is bimolecular and exhibits a specific acid catalysis. The enthalpy and entropy of activation were determined at pH 12.89. A mathematical treatment of the reaction kinetics allows the complete characterization of the final state and determination of the percentage of reduced haloamine in terms of [NaBH 4 ]/[R 1 R 2 NCl] ratio, pH and temperature. A reaction mechanism is proposed. Copyright © 2002 John Wiley & Sons, Ltd.