CRYSTAL AND MOLECULAR-STRUCTURE OF CIS-CHLORO-P-TOLYL-BIS(TRIETHYLPHOSPHINE)-PLATINUM(II) AND OF CIS-CHLORO-PERFLUOROPHENYL-BIS(TRIETHYLPHOSPHINE)PLATINUM(II)

The crystal structure of the title compounds has been determined from X-ray data and refined to R = 0.048 for both compounds. Crystals of (I) are orthorhombic, space group Pna21 with cell dimensions a = 19.91(1), b = 14.98(1), c = 7.82(1) Å. Crystals of (II) are monoclinic, space group P21/n with a = 11.07(1), b = 21.64(1), c = 10.05(1) Å, β = 91.24(3)°. The co-ordination of Pt(II) is nearly square planar in both complexes. The PtCl bond lengths of 2.392(8) (I) and 2.387(7) Å (II) are equal within experimental errors, whereas the two chemically non-equivalent PtP bond lengths are significantly different in both (I) and (II). Their values are 2.320(9) Å (trans to C6H4CH3) and 2.247(6) Å (trans to Cl) for (I) and 2.326(7) Å (trans to C6F5) and 2.226(7) Å (trans to Cl) for (II). No significant difference is found in PtC bond lengths (2.05(3) in (I) and 2.08(2) Å in (II)), which however appear significantly longer than the values reported for PtC bond lengths having partial double bond character. © 1978.