The Structure and Properties of (η-Cyclopentadienyl)(O-methyl dithiocarbonato)(triphenylphosphine)nickel(II)

Article abstract of DOI:10.1246/bcsj.55.2083

The title complex was synthesized, and the structure was determined by means of the X-ray diffraction technique.The crystal is triclinic; space group P<*>, a=9.944(1), b=14.336(2), c=9.759(1) Angstroem, α=107.00(1), β=117.35(1), γ=76.55(1) deg, Z=2, D_x=1.40, D_m=1.36(3) g cm^-3, μ(MoKα)=1.08 mm^-1.The O-methyl dithiocarbonato ion acts as a unidentate ligand, and it is coordinated with the metal through one sulfur atom.The coordination number of the metal is 3 if the cyclopentadienyl is regarded as a unidentate ligand.A series of <(η-cyclopentadienyl)(O-alkyl dithiocarbonato)(trialkyl- or triarylphosphine)nickel(II)>, , where R=CH3, C2H5, CH3(CH2)2, (CH3)2CH, or CH3(CH2)3; R'=C6H5, C6H5CH2, or CH3(CH2)3, were also obtained.The dissociation of the phosphine ligand of the complexes in solution was studied spectrophotometrically, and it was found that the more electron-donative the alkyl group of the O-alkyl dithiocarbonato ligand is, the weaker the phosphorus-nickel bond is.