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|Title:||Kinetics and mechanism of substitution of aqua ligands from cis-diaqua-bis(bipyridyl) ruthenium(II) complex by glutathione in aqueous medium|
|Abstract:||The kinetics of substitution of aqua ligands from cis-diaqua-bis(bipyridyl) ruthenium(II) complex by glutathione (reduced; GSH) have been studied spectrophotometrically as a function of [Ru(bipy)2(H2O)22+], [glutathione] and temperature at pH 4.8. The following rate law has been established, d[Ru(bipy)2(H2O)22+]/dt= k2[Ru(bipy)2(H2O)22+] [glutathione] where k2 is the second order rate constant. The rate increases with increase in pH in the range 4.0-5.6. The anation rate and activation parameters of this system have been calculated and compared with those of a few other anation reactions of the same complex. From all these data a reaction mechanism involving SN2 path has been suggested. A plausible mechanism indicating the nature of the activated complex has been proposed.|
|Appears in Collections:||IJC-A Vol.43A(10) [October 2004]|
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