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Complexes of hydroxamates X. Interaction of methioninehydroxamic acid with Ni(II) and Pd(II). Kinetics and reaction mechanism
Author(s) -
Marafie Hayat M.,
Shuaib Nadia,
Ibrahim Khalid,
ElEzaby Mohamed S.
Publication year - 1995
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.550270506
Subject(s) - chemistry , reaction rate constant , kinetics , metal , kinetic energy , medicinal chemistry , reaction rate , stereochemistry , inorganic chemistry , catalysis , organic chemistry , physics , quantum mechanics
The kinetic stopped flow method has been used to study the reaction rates of Ni(II) and Pd(II) with methioninehydroxamate (MX). Two reaction rates were observed in the MXNi(II) system whereas three rates were observed in the MXPd(II) system. Most of the rate steps were dependent on pH as well as on T MX (total concentration of methioninehydroxamate). The observed pseudo‐first‐order rate constants at constant pH are expressed empirically as k obs i= m i + m ′ i T MX . The parameters m i and m ′ i are pH‐dependent. It has been concluded that hydroxy metal species contributed to the explanation of the rate of the metal complexation with MX. Similar systems have been correlated with the systems of current work. © 1995 John Wiley & Sons, Inc.