
%0 Journal Article
%A Couldwell, MC 
%A House, DA 
%A Powell, HKJ 
%T Diaquabis(diamine)chromium(III) complexes: Acid dissociation constants and isomerization
%J Australian Journal of Chemistry
%D 1973/02/01
%V 26
%N 2
%P 425-429
%K 
%R https://doi.org/10.1071/CH9730425
%U https://www.publish.csiro.au/paper/CH9730425 
%X Acid dissociation constants are reported for the following equilibria:     trans-Cr(A)(B)(H2O)23+(aq) + H2O &#8596;             trans-Cr(A)(B)(OH)(H2O)2+(aq)+H3O+(aq) pK1   trans-Cr(A)(B)(OH)(H2O)2+(aq) + H2O &#8596;                trans-Cr(A)(B)(OH)2+(aq)+H3O+(aq) pK2   where A = B = en; A = B = tmd; A = en, B = tmd. Similar results were   obtained for each complex: pK1 c. 4.2, pK2 c. 7.6; 1M NaNO3, 25°. The results are compared with pK data for related complexes of chromium and cobalt. The complex Cr(en)2(H2O)(OH)2+ undergoes extensive Cr-N bond rupture to yield deaminated products. 
