الفهرس 
summaryOnly 14 pages are availabe for public view
 |  | from | 89 |  |  |
| | | from | 89 | | |
Abstract
The present work comprises a study of the kinetics and mechanism of oxidation of ternary chromium (III) complexes involving Inosine-Chromium (III) and Glycine by N-bromosuccinimide.
Chapter 1, Introduction,
Electron transfer, outer-sphere and inner-sphere mechanisms have been discussed. The nature and properties of chromium (III) and its complexes have been briefly discussed. The nature, chemical behavior and different species in aqueous solutions of N-bromosuccinimide. Have been reported. The literature concerning N-bromosuccinimide organic and inorganic oxidations are mentioned.
Chapter II, Experimental:
Encompasses the chemicals and the technique for the kinetic studies.
Chapter III, results and discussion:
Comprises the layout of the results obtained and their discussions the effect of various parameters on the rate of reaction has been discussed.
This chapter contains two parts:
Part (I), the kinetics of oxidation of [CrIII (Ino)(H2O)5]3 by N-bromosuccinimide in aqueous solutions have been studied. The rate of the reaction increases with the increasing of pH. The reaction is independent on the ionic strength. Th eoxidation of this complex obeys the following rate law.
d[CrIII]/dt={(k2K3 + k1K1K2/[H+]) [NBS][CrIII]T} / {1 + (K1/[H+]) + (K3 + K1K2/[H+])[NBS]}
An inner-sphere process may be still accommodating through replacement of coordinated H2O in the two species, by NBS. The enthalpy of activation ∆H* and entropy of activation ∆S* also were calculated.
Part (II), the kinetics of oxidation of [CrIII(Ino)(Gly)(H2O3)]2+ by N-bromosuccinimide in aqueous solutions have been studied. The rate of the reaction increases with the increasing of pH. The reaction is independent on the ionic strength. The oxidation of this complex obeys the following rate law.
d[CrIII]/dr=k1K2[NBS][CrIII]T/{(H+)/K1+1+K2[NBS]}
An inner-shpere process may be still accommodating through replacement of coordinated H2O in the two species, by NBS. The Enthalpy of activation ∆H* and entropy of activation ∆S* also were calculated.