octahedral (for 6) coordination geometry around metal centers. These titanium complexes (1, 2, and 6) showed high activities up to ca. 97 kg PE/(mol Ti·h·atm) for ethylene polymerization in the presence of MAO as coactalyst. The 13C NMR analysis revealed that linear polyethylene with low molecular weight was formed by these NHC titanium complexes. No methyl or other long-chain branch could be observed
钛络合物[(L)TiX 2(THF)]的反应(L = N,N '-[(5-R-3-叔-Bu-2-O -- C 6 H 2)CH 2 ] 2( C 3 H 2 N 2)},R =叔-Bu,L a,R = Me,L b ; X = Cl,1a,1b ; X = Br,L a,2)含2.0当量的PhCH 2 MgCl或
乙醚中的MeLi生成二甲基络合物[(L)Ti(CH 2 Ph)2 ](3a,3b)和[(L)Ti(CH 3)2 ](4a,4b)通过盐复分解。二苄基
钛络合物[(L a)Ti(CH 2 Ph)2 ](3a)吸收双
氧气体,以57%的收率得到氧插入产物[(L a)Ti(OCH 2 Ph)2 ](5)。用1当量的LiBEt 3 H在
甲苯中还原[(L a)MBr 2(THF)](2)得到
钛(III)种类[(L a)TiBr(THF)2 ](6)。通过X射线单晶分析确认了3b,4b,5和6