Isolobal Zwitterionic Niobium and Tantalum Imido and Zirconium Monocyclopentadienyl Complexes: Theoretical and Methyl Methacrylate Polymerization Studies
作者:Rocío Arteaga-Müller、Javier Sánchez-Nieves、Javier Ramos、Pascual Royo、Marta E. G. Mosquera
DOI:10.1021/om701068h
日期:2008.4.1
[MCl3(NR)(py)2] reacted with LiOAr to give the imido aryloxo complexes [MCl2(NR)(OAr)(py)2] (M = Nb, R = tBu (1a), Ar (1b); M = Ta, R = tBu (2a); Ar = 2,6-iPr2C6H3) and were alkylated with [BzMgCl], affording the tribenzyl derivatives [NbBz3(NR)] (R = tBu (3a), Ar (3b)). Similar alkylations of the aryloxo derivatives 1 and 2 gave the dibenzyl complexes [MBz2(NR)(OAr)(THF)] (M = Nb, R = tBu (5a); M = Ta, R
三氯衍生物[MCl 3(NR)(py)2 ]与LiOAr反应,生成亚氨基芳氧基配合物[MCl 2(NR)(OAr)(py)2 ](M = Nb,R = t Bu(1a), Ar(1b); M = Ta,R = t Bu(2a); Ar = 2,6- i Pr 2 C 6 H 3)并用[BzMgCl]烷基化,得到三苄基衍生物[NbBz 3(NR)] (R =t Bu(3a),Ar(3b))。芳基氧代衍生物1和2的类似烷基化得到二苄配合物[MBZ 2(NR)(OAR)(THF)](M = Nb的,R =吨BU(图5a); M =钽,R =吨BU(图6a)中,Ar(6B))。两性离子酰亚胺配合物[MBZ 2(N吨丁基)η 6 -C 6 H ^ 5 CH 2 ë(C 6 ˚F 5)3 }](M =铌,E = B ( 7A-B ),铝(7A- Al); M = Ta,E = Al(8a-Al))通过添加1当量的E(C