
%0 Journal Article
%A Druskovich, DM 
%A Kepert, DL 
%T Base decomposition of heptamolybdate
%J Australian Journal of Chemistry
%D 1975/11/01
%V 28
%N 11
%P 2365-2372
%K 
%R https://doi.org/10.1071/CH9752365
%U https://www.publish.csiro.au/paper/CH9752365 
%X The reaction of heptamolybdate, Mo7O246-, with excess hydroxide ion proceeds through base-independent, and base-dependent, pathways. The reaction is strongly dependent upon the salt chosen to maintain constant ionic strength. The values of the base-independent rate constant increase in the order K+(2.5 s-1 at 2.0 mol l-1 KCl and 25.0°C) < Na+ (9 s-1) < Li+ (20 s-1) and those of the base-dependent rate constant in the order K+ (8200 1. mol-1 s-1) < Na+ (10300 1. mol-1 s-1) < Li+ (19600 1. mol-1 s-1). Extensive measurements in mixed cation media show that the effect of ion pairing decreases in the order K+ > Na+ > Li+. The kinetic behaviour and activation parameters are contrasted with those for the base decomposition of decavanadate, V10O286-, and different mechanisms are proposed. 
