作者:Christian Döring、Winfried P. Kretschmer、Tobias Bauer、Rhett Kempe
DOI:10.1002/ejic.200900504
日期:2009.10
dialkylscandium complexes [ApScR2(thf)] (R = CH2SiMe3, CH2Ph) are initiators for controlled 3,4-selective isoprene polymerization after activation with perfluorinated tetraphenyl borates. Variation of the polymerization temperature as well as the addition of different alkylaluminium compounds influence the microstructure of the obtained polymer. Bis(dimethylsilyl)amides of scandium polymerize isoprene in the
[Sc(CH2SiMe3)3(thf)2] 或 [Sc(CH2Ph)3(thf)3] 与氨基吡啶的烷烃消除反应 (1a = (2,6-二异丙基苯基)-[6-(2,4,6-)三异丙基苯基)吡啶-2-基]胺,1b = [6-(2,4,6-三异丙基苯基)吡啶-2-基]-(2,4,6-三甲基苯基)胺,1c = (2,6-二异丙基苯基) )-[6-(2,6-二甲基苯基)吡啶-2-基]胺)导致选择性形成由一个氨基吡啶(Ap)配体稳定的钪的二烷基配合物。这些化合物与硼酸苯胺的反应导致两个烷基官能团之一的消除并提供有机钪阳离子。[ScN(SiHMe2)2}3(thf)] 与氨基吡啶 1a 的胺消除反应产生相应的单(氨基吡啶)络合物。对 [Ap*Sc(CH2Ph)2(thf)] (3a) 进行单晶 X 射线分析,[Ap*Sc(CH2Ph)(thf)3][B(C6H5)4] (4a) 和 [Ap*ScN(SiHMe2)2}2]