Phosphine dihalides as reagents for synthesis of tungsten aminomethylidyne complexes
摘要:
Reaction of [W{=C(OLi)(NPr2)-Pr-i}(CO)(5)] with X(2)PPh(3) and PPh(3) gives the aminomethylidyne complexes mer- [W(=(CNPr2)-Pr-i)X(CO)(3)(PPh(3))] (X = Cl, Br) in a convenient one-pot procedure from [W(CO)(6)]. The route appears to be general, providing ready access to a range of alkylidyne complexes including [W(=C-naphthyl)Cl(CO)(2)(tmeda)], [W(=C-thienyl)Cl(CO)(2)(tmeda)], [W(=C-naphthyl)Cl(CO)(3)(PPh(3))], [W(=C-thienyl)Cl(CO)(3)(PPh(3))] and [W(=(CNPr2)-Pr-1)Cl(CO)(2)(2,2'-bipyridyl)].