Neutral and Cationic Group 4 Complexes Containing Bis(borylamide) Ligands, [R<sub>2</sub>BNCH<sub>2</sub>CH<sub>2</sub>NBR<sub>2</sub>]<sup>2</sup><sup>-</sup> (R = 2,4,6-i-Pr<sub>3</sub>C<sub>6</sub>H<sub>2</sub>, M = Zr; R = Cyclohexyl, M = Ti, Zr, Hf)
作者:Timothy H. Warren、Richard R. Schrock、William M. Davis
DOI:10.1021/om970765o
日期:1998.2.1
Reaction of Li2(TripBen)(THF)4 ([(2,4,6-i-Pr3C6H2)2BNCH2CH2NB(2,4,6-i-Pr3C6H2)2]2- = (TripBen)2-) with ZrCl4(THF)2 in toluene cleanly provides (TripBen)ZrCl2. (TripBen)ZrCl2 can be alkylated with Grignard reagents to yield the dimethyl (2), diethyl (3), and dibutyl (4) derivatives, (TripBen)ZrR2. The structure of (TripBen)Zr(CD3)2 reveals that π bonding between boron and nitrogen results in one Trip
Li 2(TripBen)(THF)4([(2,4,6-i-Pr 3 C 6 H 2)2 BNCH 2 CH 2 NB(2,4,6-i-Pr 3 C 6 H 2)2 ] 2 - =(TripBen)2 - )与的ZrCl 4(THF)2在甲苯中干净地提供(TripBen)的ZrCl 2。(TripBen)ZrCl 2可以用格氏试剂烷基化以生成二甲基(2),二乙基(3)和二丁基(4))派生词(TripBen)ZrR 2。(TripBen)Zr(CD 3)2的结构表明,硼与氮之间的π键键导致每个硼上的一个Trip环在两个烷基上取向。(TripBen)ZrMe 2和B(C 6 F 5)3在戊烷中的反应产生(TripBen)ZrMe} MeB(C 6 F 5)3 }(5a)的无色晶体。二烷基配合物2 - 4与[HNME反应2 PH] [B(C 6 ˚F 5)4在甲苯中产生]游离二甲基苯胺和根据