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Mechanistic Studies on the reactions of cis-diaquobisoxalatochromate(III) ion with 2,2′-dipyridyl and 1,10-phenanthroline by Prof. Dr. D. Banerjea; (Miss) J. Roy is a Chemistry article available to read on EtoBox.

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## Mechanistic Studies on the Reactions of cis-Diaquobisoxalatochromate(lll) Ion with B,P'-Dipyridyl and 1,1O-PAenanthroline By D. BANERJEA and (Miss) J. ROY With 3 Figures A b s t r a c t . Kinetic studies in aqueous solutions on the replacement of the aquo ligands in cis-Cr(Ox),(H,O), by 2,Y-dipyridyl (dipy) and 1,10-phenanthroline (phen) forming cis-Cr(Ox),(AA)-(AA = dipy or phen) were made spectrophotometrically. The reaction in each case occured in two concurrent paths, one of which was independent of the reagent (AS) concentration (rate constant, k,, identical for both the systems), and another which was first order with respect to it (rate constant, kR). k, and kR values have been evaluated a t different temperatures (40-7OoC), and from there the corresponding AH\* and AS\* values. The results suggest a dissociation mechanism for the reagent independent path where Cr-OH, bond rupture is only significant in the transition state. The value of kR/k, (higher for phen compared to dipy) was of the order of 102 suggesting significant bond formation by the reagent in the transition state of the reagent dependent path. However, AH\* corresponding to kRwas ca. 1.7 to 1.8 times that co

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Author

Prof. Dr. D. Banerjea; (Miss) J. Roy

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0372-7874)

Published

1973

Language

EN

Field

Chemistry (Physical Sciences)