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|Title:||Kinetics and mechanism of oxidation of two new chromium(lll) complexes by hydrogen peroxide|
|Authors:||Pal, S C|
Tarafder, M T H
|Abstract:||The kinetics and mechanism of oxidation of [Cr(1,3-diaminopropane)2(NCS)2]NCS.4H2O and [CrLCl2]Cl.2H2O(L= Schiff base, C17H24N4S2 derived from condensation of N,N-bis-(2-aminoethyl)-1,3- propanediamine and thiophen-2-aldehyde) by hydrogen peroxide have been investigated spectrophotometrically at 30°C. The reactions proceed through a rapid pre-equilibrium formation of a peroxide adduct which dissociates through cleavage of oxygen-hydrogen, metal-chlorine (rate-determining) and oxygen-oxygen bonds to give a dioxo Cr(IV) product which on further oxidation by a second H2O2 molecule gives Cr(VI) oxo-product. Different kinetic parameters of the reactions have been calculated and the general mechanism of the reactions has been postulated.|
|Appears in Collections:||IJC-A Vol.35A(11) [November 1996]|
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