摘要:
Reaction of [Ni('MeS2')2] (1) ('MeS2'- = o-(methylthio)thiophenolate(1-)) with methyl lithium yields the methyl complex anion [Ni(CH3)('MeS2')2]- which can be isolated as (NMe4)[Ni(CH3)('MeS2')2] (2). The molecular structures of 1 (monoclinic, P2(1)/c, Z = 2, a = 791.5(5), b = 1083.1(8), c = 894.1(6) pm, beta = 92.79(5)-degrees, R/R(w) = 0.063/0.049) and 2.MeOH (monoclinic, P2(1)/c, Z = 4, a = 1901.0(12), b = 830.3(9), c = 1716.1(14) pm, beta = 113.84(5)-degrees, R/R(w) = 0.072/0.053) were elucidated by X-ray structure analysis. 1 contains a planar [NiS4] core, 2.MeOH exhibits a planar [NiS3C] core, one thioether donor being decoordinated. 1 does not react with CO but 2 undergoes immediate reaction with CO. Monitoring the reaction by IR spectroscopy yields evidence for the intermediate formation of labile Ni-acetyl complexes. Reaction of 2 with protonic acids (HBF4/Et2O, HCl/THF) yields CH4 and 1. Thermolysis of 2 in solid state as well as in acetone solution at room temperature, however, gives C2H6, and 1 was identified as one of the resulting nickel species.