Substitution on five µ-oxo/µ-sulphido incomplete cuboidal MoIV3 ions [Mo3OxS4–x(H2O)9]4+: kinetic effects resulting from the replacement of core oxo by sulphido ligands
Abstract
A 570-fold spread in rate constants (25 °C), [H+]= 2.0 M, is observed for 1 : 1 NCS– substitution (of H2O) at Mo on the title complexes, with replacement of core µ3(O) by µ3(S) decreasing (factor of 10), and further replacement of the three µ2(O) by µ2(S) increasing (factor of 570) the rate of substitution.