Abstract

Kinetics and mechanisms of substitution reactions of square-planar platinum(II) dithiolato-complexes [Pt(S–S)2]2–[S–S2–=(NC)2C:CS22–(cet), S(NC)C:C(NC)S2–(ct), NO2CH:CS22–(net), S(O)C:C(O)S2–(dta), NC–N:CS22–(cimd), and NC(Ph)C:CS22–(npet)], with both uni- and bi-dentate nucleophiles have been studied in aqueous solution. The reactions are second order, first order in substrate and first order in nucleophile. Activation parameters have been measured for a number of the reactions. The results permit a comparison of the reaction mechanisms and relative reactivities of dithiolato-complexes of nickel, palladium, and platinum.

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