Lu(CH2SiMe3)3(THF)2 afforded a C2-symmetric binuclear complex (4). Complexes 3a, 3b, 3c, and 4 represent rare examples of THF-free binuclear lanthanide bis(alkyl) complexes supported by non-cyclopentadienyl ligands. All complexes have been tested as initiators for the polymerization of isoprene in the presence of AlEt3 and [Ph3C][B(C6F5)4]. Complexes 1a, 1b, and 3a show activity, and 1b is the most active initiator
的N,N- -bidentate
配体2 - (Ñ -2,6-R)亚
氨基甲基)}
吡咯(HL 1,R =二甲基苯基;HL 2,R =
二异丙基苯基)已被制备。HL 1与1当量的
镧系元素三(烷基)s Ln(CH 2 SiMe 3)3(THF)2轻松反应,得到
镧系元素双(烷基)络合物L 1 Ln(CH 2 SiMe 3)2(THF)n(1a, Ln = Lu,n= 2;1b,Ln = Sc,n= 1)通过
烷烃消除。庞大的
配体HL 2的反应用1当量的Ln(CH 2 SiMe 3)3(THF)2生成双(
吡咯基铝二
氨基)
镧系单(烷基)络合物L 2 2 Ln(CH 2 SiMe 3)(THF)(2a,Ln = Lu; 2b, Ln = Sc),选择性地。的N,N- -bidentate
配体HL 3,2-二
甲基氨基甲基吡咯,与Ln(CH 2 SiMe 3)3(THF)2反应,产生中心对称的双
金属双(烷基)配合物(3a,Ln