Abstract
Cationic five-coordinate nickel(II) complexes containing a nickel—tin σ-bond with the general formula [Ni(SnPh 3)(L)]BPh 4 (L tris(2-diphenylphosphinoethyl)amine, np 3; tris(2-diphenylphosphinoethyl)phosphine, pp 3) were synthesized by reaction of the five-coordinate complexes [NiCl(L)]BPh 4 with LiSnPh 3. The structure of the [Ni(SnPh 3)(np 3)]BPh 4 derivative was determined by X-ray diffraction. The crystals are monoclinic, space group P2 1 c with cell dimensions a 18.88(1), b 38.53(2), c 18.93(1) Å, β 93.3(1)°, D c1.34 g cm -3 for Z 8. The structure was solved by three-dimensional Patterson and Fourier syntheses and refined by least-squares techniques to a final conventional R factor of 0.088. The structure consists of trigonal bipyramidal [Ni(SnPh 3)(np 3)] + cations and BPh 4 - anions, with a Ni—Sn bond distance (av) of 2.556(15) Å.
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