Equilibria among the Chloroammine Complexes of Palladium (II)
Reinhardt, Richard A.
Brenner, Norma L.
Sparkes, Robert K.
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Potentiometric and spectrophotometric studies have been made of the equilibria among several chloroammine complexes of Pd(II) in ammonium salt solutions at 25 and 30˚. For unit ionic strength at 25˚, equilibrium constants found potentiometrically for the substitution of one NH₃ by Clˉ are: in Pd(NH₃)₄²⁺, 6.1 X 10ˉ⁵; Pd(NH₃)₃CI⁺, 1.6 X 10ˉ⁴; Pd(NH₃)₂,CI₂, 1.9 X 10ˉ⁶. Aquation constants are, similarly: Pd(lNH₃)₃Cl⁺, 0.0010; Pd(NH₃)₂Cl₂, 0.0047. ΔH˚ for the substitution by Clˉ of each of the first two NH₃ molecules in Pd(NH₃)₄²⁺ is estimated as 10 kcal.
The article of record as published may be found at http://dx.doi.org/10.1021/ic50048a013
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