Crystal structures of transition-metal aryls. Part V. trans-Bis[methyl-diphenylphosphine]bis(σ-pentafluorophenyl)nickel(II)

Abstract

The title compound crystallizes in the centrosymmetric orthorhombic space-group Pbca(D_2h ¹⁵, No. 61) with a= 17·827(20), b= 9·163(10), c= 21·206(27)Å 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 C_i symmetry, the Ni^II 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)Å;. These values are discussed and compared with results for trans-(PPh₂Me)₂Ni(σ-C₆F₅)-(σ-C₆Cl₅).