Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization
作者:Vassily Yu. Rad'kov、Grigorii G. Skvortsov、Dmitry M. Lyubov、Anton V. Cherkasov、Georgy K. Fukin、Andrei S. Shavyrin、Dongmei Cui、Alexander A. Trifonov
DOI:10.1002/ejic.201101440
日期:2012.5
6-R2C6H3) (R = Me, iPr), were synthesized and successfully employed as tridentate ligands for the preparation of the dialkyl rare earth complexes [2-MeOC6H4NC(tBu)N(2,6-R2C6H3)]Ln(CH2SiMe3)2(L)n Ln = Y, Lu; R = Me, iPr; L = thf (n = 2), dme (n = 1)}. These ligands provided enhanced stability for the complexes. The X-ray structure determinations revealed that intramolecular coordination of the 2-MeOC6H4 group
合成了两种在侧臂中含有侧链路易斯碱的新脒,2-MeOC6H4NC(tBu)NH(2,6-R2C6H3) (R = Me, iPr),并成功用作制备二烷基的三齿配体稀土配合物 [2-MeOC6H4NC(tBu)N(2,6-R2C6H3)]Ln(CH2SiMe3)2(L)n Ln = Y, Lu; R = 我,iPr;L = thf (n = 2), dme (n = 1)}。这些配体为复合物提供了增强的稳定性。X 射线结构测定表明,如果 thf 分子与金属中心 (Ln = Y, Lu) 配位,则实现 2-MeOC6H4 基团的分子内配位,这导致配位数为 6。用 dme 处理复合物 [2-MeOC6H4NC(tBu)N(2,6-Me2C6H3)]Lu(CH2SiMe3)2(thf) 得到六配位的 dme 加合物,其中脒配体的甲氧基已经从金属配位球。[2-MeOC6H4NC(tBu)N(2,6