Abstract
The title compound crystallizes in the centrosymmetric orthorhombic space-group Pbca(D2h15, No. 61) with a= 17·827(20), b= 9·163(10), c= 21·206(27)A and Z= 4. A single-crystal X-ray diffraction study has led to the accurate location of all atoms including hydrogens. The structure was refined, by the method of least-squares, to R 3·8% for 1806 independent non-zero reflections. The molecule has precise Ci symmetry, the NiII centre being in square-planar co-ordination to two phosphine and two pentafluorophenyl ligands with Ni–σ-C6F5 1·939(3) and Ni–PPh2Me 2·206(1)A;. These values are discussed and compared with results for trans-(PPh2Me)2Ni(σ-C6F5)-(σ-C6Cl5).
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