Unexpected Binuclear Bis(phenolato) Titanium (IV) {[(L)Ti(Ph)]<sub>2</sub>(μ-OEt)<sub>2</sub>} Assisted by Carbon−Oxygen Bond Cleavage and Alkali-Metal-Containing Titanium(III) Complexes [Ti(L)<sub>2</sub>·M(solv)<sub>2</sub>] (M = Li, Na, K; solv = THF, DME)
作者:Dao Zhang
DOI:10.1021/om700298f
日期:2007.7.30
According to the crystal structure, 2 and 3 are monomeric and tetrahedral, with boat-conformation ligands. The X-ray structure of 4 showed the complex to be dimeric, with titanium in a distorted pyramidal coordination geometry. The reduction of 1 with 1.0 equiv of LiBEt3H, excess Na/Hg, or 1.0 equiv of KC8 gave the titanium(III) salts [Ti(L)2·M(THF)2] (M = Li, 5; M = Na, 6) and [Ti(L)2·K(DME)2] (7), respectively
钛配合物[(L)Ti(CH 2 Ph)2 ](2)通过[[ L)TiCl 2 ](L = 2,2'-亚甲基双(6-叔丁基-4-甲基苯酚))反应制备。 (1)与PhCH 2 MgCl在Et 2 O中的比率为1:2,产率为69%,而1与PhLi在相同条件下的反应得到的[(L)Ti(Ph)2 ](3)小于40%的收率和出乎意料的稀有苯基醇盐桥接的化合物[(L)Ti(Ph)] 2(μ-OEt)2 }(4)在。9%的产率。根据晶体结构,2和3是单体和四面体,具有舟状配体。的X射线结构4表明该复合物是二聚,与钛在扭曲角锥形配位几何形状。用1.0当量的LiBEt 3 H,过量的Na / Hg或1.0当量的KC 8还原1,得到钛(III)盐[Ti(L)2 ·M(THF)2 ](M = Li,5 ; M = Na,6)和[Ti(L)2 ·K(DME)2 ](7), 分别。通过单晶X射线分析确认了5和7的分