Kinetic studies on 4d and 5d transition-metal complexes. Part IV. Kinetic studies on the chloropenta-amminerhodium(III)–aquopentaamminerhodium(III) system

Abstract

The kinetics of the forward and reverse reactions in the system [Rh(NH₃)₅Cl]²⁺+ H₂O [graphic omitted] [Rh(NH₃)₅H₂O]³⁺+ Cl^– in aqueous solution have been studied in the temperature range 77–97·5° at a number of ionic strengths in the range 0·01–0·07 M. The aquation rate constant is independent of ionic strength and is summarised by the equation k₁(sec.^–1)= 2·838 × 10¹⁰ exp (–24,419 ± 220)/RT The anation rate constant exhibits the primary salt effect. The rate constant at zero ionic strength is summarized by the equation k_–2°(mole 1.^–1sec.^–1)= 1·584 × 10¹⁷ exp (–28,244 ± 200)/RT