
%0 Journal Article
%A Buckingham, DA 
%A Clark, CR 
%A Webley, WS 
%T Base hydrolysis of acidopentaaminecobalt(III) ions and the question of common intermediates. Hydrolysis of some t-[Co(tren)(NH<sub>3</sub>)X]<sup>2+/3+</sup> ions (X = NO<sub>3</sub><sup>-</sup>, MeSO<sub>3</sub><sup>-</sup>, Cl<sup>-</sup>, Me<sub>2</sub>SO, N<sub>3</sub><sup>-</sup>)
%J Australian Journal of Chemistry
%D 1980/02/01
%V 33
%N 2
%P 263-271
%K 
%R https://doi.org/10.1071/CH9800263
%U https://www.publish.csiro.au/paper/CH9800263 
%X The preparations, and characterizations, of the complex cations t-[Co(tren)(NH3)X]2+/3+* (X = NO3-, Me2SO, H2O, Cl-, N3-) and p-[Co(tren)(NH3)X]2+/3+ (X = N3-, Cl-, H2O) are described. Base hydrolysis of t-[Co(tren)(NH3)X]2+/3+ (X = MeSO3-, Me2SO, NO3-, N3-) and of p- [Co(tren)(NH3)N3]2+ follows the rate law kobs = k[OH-] over the [OH-] range 1.0-10-4 mol dm-3 except for the 3+ ion t-[Co(tren)(NH3)Me2SO]3+ where some curvature is observed at [OH-] > 0.025 mol dm-3. The products for the t-[Co(tren)(NH3)X]2+/3+ ions (X = Cl-, NO3-, MeSO3-, Me2SO) depend on X, and on the presence or absence of supporting electrolyte (1.0 mol dm-3 NaClO4 or NaN3) varying from 12.1 % retention of the t-configuration for X = NO3- in the absence of electrolyte to c. 26% for X = Me2SO in 1.0 mol dm-3 NaN3. Significantly more retention is observed in the azido products (75-80% t-[Co(tren)(NH3)N3]2+). The results are interpreted in terms of important contributions to the mechanism from pre-formed ion pairs. 
