Platinum(II) halide complexes of PPh2(CFCF2) and PPh2(CClCF2). The synthesis and crystal structure of [PtI(μ-I){PPh2(CXCF2)}]2, (X = F, Cl); the first crystallographically characterised iodide-bridged platinum(II) phosphine dimers

Changing the halogen X in the starting material PPh2(CXCF2) X = F, Cl affords preferentially, on reaction with K2PtBr4, monomeric cis-[PtBr2{PPh2(CFCF2)}2] and trans-[PtBr2{PPh2(CClCF2)}2], respectively. In contrast the reaction with K2PtI4 gives trans-[PtI2{PPh2(CXCF2)}2], and the crystallographically characterized symmetric-trans dimeric species [PtI(μ-I){PPh2(CXCF2)}]2.