Synthesis and Decomposition of Alkyl Complexes of Tungsten(IV) That Contain a [(Me<sub>3</sub>SiNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N]<sup>3</sup><sup>-</sup> Ligand
作者:Richard R. Schrock、Scott W. Seidel、Nadia C. Mösch-Zanetti、Daniel A. Dobbs、Keng-Yu Shih、William M. Davis
DOI:10.1021/om970670m
日期:1997.11.1
The synthesis of a variety of tungsten alkyl complexes of the type [N3N]WR ([N3N]3- = [(Me3SiNCH2CH2)3N]3-; R = Me, Et, Bu, CH2Ph, CH2SiMe3, CH2CMe3, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclopentenyl) was attempted by alkylation of [N3N]WCl complexes. Only the methyl, phenyl, and cyclopentenyl complexes could be isolated. The susceptibility of the [N3N]WR complexes is similar to that
多种钨烷基类型的络合物的合成[N 3 N] WR([N 3 N] 3 - = [(ME 3 SiNCH 2 CH 2)3 N] 3 - ; R =甲基,乙基,卜,通过[N 3 N] WCl络合物的烷基化尝试CH 2 Ph,CH 2 SiMe 3,CH 2 CMe 3,环丙基,环丁基,环戊基,环己基,环戊烯基)。只能分离出甲基,苯基和环戊烯基配合物。[N 3 N] WR配合物的磁化率与[N 3N] WCl; 由于自旋轨道效应和低对称配体场分量的组合,有效力矩被抑制,导致d 2基态自旋三重态的零场分裂。由于α,α-脱氢而产生分子氢和亚烷基配合物[N 3 N] W⋮CR' ,因此未观察到线性烷基配合物。[N 3 N] W(环丙基)在一级过程中析出乙烯,生成[N 3 N] W⋮CH,而[N 3 N] W(环丁基)转化为1-钨环戊烯络合物[N 3 X射线研究证实为N] W(CHCH 2 CH 2 CH