Add time:09/04/2019         Source:sciencedirect.com

A conductivity method was utilized to study the kinetics of the successive replacement of chloride ligands by ammonia in methanol solvent for the three complexes. For t-Pt(P(C2H5)3)2Cl2 there was an induction period and complete description of the kinetics was not achieved. The second ammonation step for this compound was not complete but approached an equilibrium steady state. For t-Pt(NH3)2Cl2, solvation and ammonation occurred at comparable rates. For t-Pt(P(C2H5)3)2Cl2 each ammonation proceeded essentially to completion by a second order process. At 35°C it appeared that the ammonation rates of all three complexes did not differ greatly so little cis effect was apparent. In each case the second ammonation rate constant was an order of magnitude lower than that for the initial ammonation reaction.

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