Synthesis of Titanium, Zirconium, and Hafnium Complexes That Contain the [(MesitylN-<i>o</i>-C<sub>6</sub>H<sub>4</sub>)<sub>2</sub>O]<sup>2</sup><sup>-</sup> Ligand
作者:Lan-Chang Liang、Richard R. Schrock、William M. Davis
DOI:10.1021/om0000921
日期:2000.6.1
(MesitylNH-o-C6H4)2O (H2[MesNON]) has been synthesized in ∼70% yield, and several [MesNON]2- complexes of Ti, Zr, and Hf have been prepared, in particular a variety of dialkyl complexes, [MesNON]MR2 (M = Zr, R = Me, CH2CMe3, Ph; M = Hf, R = Me, Et, CH2CHMe2, CH2CMe3, Ph). [MesNON]ZrMe2 can be activated with [Ph3C][B(C6F5)4] or [PhNMe2H][B(C6F5)4], but the resulting cationic species will only oligomerize
(MesitylNH- ø -C 6 ħ 4)2 Ô(H 2 [MesNON])在〜70%的产率被合成,并且几个[MesNON] 2 -的Ti,Zr和Hf的配合物已经制备,特别是各种二烷基络合物,[MesNON] MR 2(M = Zr,R = Me,CH 2 CMe 3,Ph; M = Hf,R = Me,Et,CH 2 CHMe 2,CH 2 CMe 3,Ph)。[MesNON] ZrMe 2可以用[Ph 3 C] [B(C 6 F 5)4 ]或[PhNMe 2H] [B(C 6 F 5)4 ],但是所得的阳离子物质只会低聚1-己烯。我们得出结论,立体体积大的叔丁基在基团[(R'N- ø -C 6 ħ 4)2 O] 2 -系统对于[R'NON]的成功必要2 -为活性聚合的Zr的催化剂体系1-己烯。