Trans influence of triphenylstibine. Crystal and molecular structures of cis-[PtCl2 (SbPh3)2] and trans-[PtI2 (SbPh3)2]

Article abstract of DOI:10.1016/S0020-1693(97)06130-6

Crystals of cis-[PtCl₂(SbPh₃)₂] (1) are monoclinic, space group P2₁/a with a=20.5708(12), b=10.1942(4), c=33.3984(15) A, β=94.394(4)° and Z= 8. Substitution of chloride for iodide yields trans-[Ptl₂(SbPh₃)₂] (2), the crystals of which are monoclinic, space group P2₁/c with a=18.108(4), b=10.102(2), c=19.115(5) A, β=95.241(16)° and Z=4. The average Pt-Cl distance in 1 is 2.338(12) A, implying a trans influence of triphenyl stibine comparable with that of triphenyl phosphine, as opposed to what has been reported earlier. IR and Raman data for 1 and 2 are reported and discussed.