Nickel—nitrosyl Complexes: structure of nitrosyltris(trimethylphosphine)nickel hexafluorophosphate, {Ni(NO)(PMe 3) 3} PF 6

Abstract

The crystal and molecular structure of nitrosyltris-(trimethylphosphine)nickel(O) hexafluorophosphate, {Ni(NO)(PMe 3) 3}PF 6, has been determined from three dimensional single crystal X-ray analysis. The compound crystallizes in the orthorhombic space group Pnma with Z = 4 and a unit cell of dimensions: a = 16.253(3), b = 10.536(1) and c = 12.228(2) Å. The structure was solved by conventional heavy atom techniques and refined by least-squares methods to R 1 = 0.036 and R 2 = 0.048 respectively for 1085. independent reflections. The coordination geometry around the nickel is a slightly distorted tetrahedron with an average PNiP angle of 105.63° and PNiN angle 113.03°. The nickel nitrosyl group is slightly bent with an NiNO angle of 175.4(5)°. The bending occurs in the ClPlNiNO plane toward Pl. The structure is compared with other tetrahedral {MNO} 10 phosphine complexes and the MNO bonding is discussed.