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Role of resin‐manganese(II) complexes in hydrogen peroxide decomposition
Author(s) -
Salem Ibrahim A.
Publication year - 1994
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550260304
Subject(s) - chemistry , triethanolamine , hydrogen peroxide , reaction rate constant , steric effects , ethylenediamine , catalysis , decomposition , manganese , kinetics , activation energy , medicinal chemistry , inorganic chemistry , stereochemistry , organic chemistry , analytical chemistry (journal) , physics , quantum mechanics
The kinetics of hydrogen peroxide decomposition has been investigated in the presence of Wofatit KPS (4% DVB, 40–80 μm) resin in the form of mono (mea), di (dea), triethanolamine (tea), ethylenediamine (eda), and N , N ′‐diethylethylenediamine (deeda)‐ Mn(II) complexes. The rate constant k (per g dry resin) was evaluated over the temperature range 25–40°C. The reaction was first‐order with respect to [H 2 O 2 ]. The rate constant, k , with the three ethanolamines decreased in the following order mea > dea > tea which is the same order of basicity. Also, k value with deeda is lower than eda as a result of steric hindrance. The peroxo metal complex which formed at the beginning of the reaction, was found to contain the catalytic active species. The rate of reaction was proportional to [Mn‐complex], [H 2 O 2 ] and [H + ] −1 . The activation parameters were calculated and a probable reaction mechanism is proposed. © 1994 John Wiley & Sons, Inc.