Abstract
Cationic tetracoordinate nickel(II) compounds containing a nickelcarbon σ bond with general formula [NiR(etp)]Y, (etp bis(2-diphenylphosphinoethyl)phenylphosphine, PhP(CH 2CH 2PPh 2) 2; R = CH 3, CH 2C 6H 5, C 6H 5; Y = BPh 4, PF 6) were synthesized by reaction of the complexes [NiX(etp)]Y (X = halogen) with appropriate Grignard reagents. This type of organometallic complexes undergo insertion of sulfur dioxide into the NiC bond with formation of tetracoordinate O-sulfinate derivatives of nickel(II). The structure of [NiOS(O)CH 3(etp)]BPh 4 has been determined from three dimensional X-ray data collected by counter methods. The compound crystallized in the triclinic group P 1 with cell dimensions a 16.726(4), a 15.350(4), c 11.632(3) Å, α 66.55(4), β 73.37(4), γ 74.75(4)°, Z = 2. The structure was refined by full matrix least-squares methods to a conventional R factor of 0.076. The coordination polyhedron has a distorted square planar geometry. The sulfinate group is linked to the metal through an oxygen atom.
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