Facile Synthesis of Lanthanidocenes by the “Borohydride/Alkyl Route” and Their Application in Isoprene Polymerization
作者:Marc Visseaux、Michael Terrier、André Mortreux、Pascal Roussel
DOI:10.1002/ejic.201000184
日期:2010.6
was isolated as a byproduct and structurally characterized, revealing an unprecedented structural arrangement. In combination with BEM, complexes 2a, 3a, and 4a were found to be efficient in isoprene polymerization to afford highly stereoregular trans-polyisoprene. Similar results were obtained by an "all in situ" approach starting from Nd(BH 4 ) 3 (thf) 3 /BEM mixtures in the presence of 2 equiv. of
在 2 当量的存在下,从等摩尔量的 Ln(BH 4 ) 3 (thf) 3 (Ln = Nd, Sm) 和正丁基乙基镁 (BEM) 开始,通过简单的方法合成了几种硼氢化镧系元素。环戊二烯衍生物。根据环戊二烯的性质,单金属 Cp* 2 Nd(BH 4 )(thf) (Cp* = C 5 Me 5 ) (1)、异二金属 [Cp 2 Nd(BH 4 )(μ-BH 4 )] 2 Mg(thf) 4 (Cp = C 5 H 5 ) (2), [(CMe 2 C 5 H 4 ) 2 Ln(BH 4 )(μ-BH 4 )] 2 Mg(thf) 3 (Ln = Nd, 3a;Ln = Sm, 3b) 和单金属苯胺基环戊二烯基化合物 (C 5 Me 4 CH 2 SiMe 2 NPh)Ln(BH 4 )(thf) 2 (Ln = Nd, 4a; Ln = Sm, 4b)。通过 1 H NMR 光谱、元素分析和