Synthesis and crystal structure of trans-tetrachloro(C, C-dichloro-C-phenyl-methyl-nitrido)(phenylnitrilo)tungsten(VI), trans-[WCl4(NCCl2Ph)(NCPh)]

A product of the insertion, namely, trans-tetrachloro(C, C-dichloro-C-phenyl-methyl-nitrido)(phenylnitrilo) tungsten(VI), trans-WCl₄(NCCl₂ Ph)(NCPh)] (I), is synthesized by the reaction of WCl₆ with PhCN in CCl₄ under refluxing for 2 h. Judging from the characteristic IR bands ν(C≡N) and ν(W≡N), the complex synthesized is identical to the compound prepared earlier at room temperature. The crystal structure of complex I is determined using X-ray diffraction analysis. It is revealed for the first time that the coordination polyhedron of the tungsten atom in complex I is a distorted octahedron with four chlorine atoms in the equatorial plane. The axial positions are occupied by the N(1) atom W-N(1), 2.265(13) Å] of the coordinated benzonitrile group and the N(2) atom W-N(2), 1.732(13) Å] of the multiply bonded ligand NCCl₂ Ph. __________ Translated from Kristallografiya, Vol. 49, No. 4, 2004, pp. 728–731. Original Russian Text Copyright ? 2004 by Sinyakov, Aleksandrov, Ovchinnikova.