Dash, Anadi C. ; Mohanty, Brundaban (1980) Kinetics and mechanism of the anation of cis (aquo)(ammine) bis(ethylenediamine) Co(III) by oxalate Journal of Inorganic and Nuclear Chemistry, 42 (8). pp. 1161-1164. ISSN 0022-1902
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0022-1902(80)80429-5
Abstract
The kinetics of the anation of cis (aquo)(ammine)bis(ethylenediamine)Co(III) by H2C2O4, HC2O4- and C2O42- have been investigated at 50-60°C and I = 1.0 mol dm-3 (ClO4-). Association of the aquo cation with oxalic acid could not be identified. The association constants of the aquo-HC2O4- and aquo-C2O42- ion-pairs are essentially temperature independent and have values 1.5 and 5.8 dm3 mol-1 (50-60°C) respectively. The interchange reactions of the ion-pairs to yield the innersphere complexes, cis[(en)2(NH3)CoC2O4]+ or its acid form, are assigned a dissociative mechanism, Id, involving Co □ O bond breaking. The mechanism of the anation of the aquo cation by H2C2O4 may be Id but the possibility of rate limiting addition of oxalic acid to the Co □O bond can not be completely ruled out.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 68734 |
Deposited On: | 08 Nov 2011 04:10 |
Last Modified: | 29 Nov 2011 07:40 |
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