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Kinetics of 1:1 thiocyanate (and chloride) substitution at molybdenum on the cuboidal clusters [Mo4S4(H2O)12]4+ and [Mo4S4(H2O)12]5+ in aqueous solution

Substitution studies at 25 o C, I=2.00 M (LiClO 4 ), on the title cuboidal Mo/S aqua ions are reported for the first time. Two consecutive reaction steps with large and small absorbance changes, respectively, are identified for the NCS - substitution on the Mo III 4 ion [Mo 4 S 4 (H 2 O) 12 ] 4+