The reactions of NbCl3 with Me3SiOMe in the appropriate molar ratios have given new alkoxoniobium(V) derivatives of the type NbCl5−x (OMe)x (x = 2 (I), 3 (II)). Reactions of I and II with various ligands afford the corresponding species NbCl5−x(OMe)xL, x = 2, L = OPPh3 (III); L = OAsPh3 (IV); L = THF (V); L = Cl− (VI); x = 3, L = OPPh3 (VII); L = Cl− (VIII). Similar hexacoordinate compounds NbCl3(OR)2(OPPh3)
NbCl的反应3与我3 SiOMe在适当的摩尔比都给予了类型的新alkoxoniobium(V)衍
生物NbCl 5- X(OME)X(X = 2(I),3(II))。I和II与各种
配体的反应得到相应的NbCl 5- x(OMe)x L,x = 2,L =
OPPh 3(III);L = OAsPh 3(IV);L =
四氢呋喃(V); L =
氯-(VI); x = 3,L =
OPPh 3(VII);L =
氯-(VIII)。相似的六配位化合物NbCl 3(OR)2(
OPPh 3),(R = Me(III),R = Et(IX),R = Pr i(X))已通过NbCl 5(
OPPh 3)与相关的Me 3 SiOR化合物反应获得。化合物I和II也与[LiN(SiMe 3)2 ] Et 2 O} 2反应,得到[NbCl(μ-OMe)[N(SiMe 3)2 ](NSiMe 3)] 2(XI)和[Nb