Thermal Cis–Trans Isomerization of Dihalogenobis[trialkyl(or aryl)phosphine]platinum(II) in the Solid State

Solid-state thermal cis–trans isomerization of the platinum(II) complexes of the type [PtX2(PR3)2] were investigated by means of DSC methods, where X is Cl, Br, or I; R is CH3, C2H5, n-C3H7, n-C4H9, or C6H5. High isomerization ratios (93–100%) were observed for the cis complexes of P(C2H5)3 (X: Br; I), P(n-C3H7)3 (X: Br; I), and P(n-C4H9)3 (X: Cl; Br).