Stable terminal methylene complexes of osmium(II) and ruthenium(II). The unexpected preferential migration of aσ-aryl ligand to carbon monoxide rather than to methylene
作者:D. Scott Bohle、George R. Clark、Clifton E.F. Rickard、Warren R. Roper、L.James Wright
DOI:10.1016/0022-328x(88)87095-5
日期:1988.12
Isolable methylene complexes MCl(η2-C[O]R)(CH2)(PPh3)2 (M = Ru; R = Ph, o-tolyl, p-tolyl, 2a–2c: M Os; R = o-tolyl, 2d) result when MClR(CO)(PPh3)2, 1a–1d, are treated with diazomethane. Halide metathesis of 2a with lithium bromide or iodide results in the halide substituted methylene complexes RuX(η2-C[O]Ph)(CH2)(PPh3)2, X Br, 3a, and X I, 4a. Carboxylates also substitute for the chloride
可分离的亚甲基络合物的MC1(η 2 -C [O] R)(CH 2)(PPH 3)2(M =钌; R = PH,Õ甲苯基,p -甲苯基,2A - 2C:M锇; R = Õ甲苯基,2d中时MCLR(CO)(PPH)结果3)2,1A - 1D中,用重氮甲烷处理。的卤化物复分解图2a与溴化锂或卤化物取代的亚甲基络合物RUX(η碘化结果2 -C [O]的pH)(CH 2)(PPH 3)2,XBR,3A和XI,4a。羧酸盐也代替在氯化物2但最终的产品,] R')(R')(R)(CO)(PPH 3)2,图5A - 5F(M钌,锇; RpH值,p -甲苯基,ø甲苯基:R'Me中,p -甲苯基),从η芳基的反向迁移结果2 -酰基的金属和除羧酸tothe末端亚甲基的配体。这些物种中的一个的结构的研究中,] CH 3)(PH)(CO)(PPH 3)2,图5a,其在结晶斜空间群P 21 / Ñ,一个14