文献类型：期刊文献

英文题名：Synthesis and crystal structure of mono-chelating (chiral) ether side chain cyclopentadienyl lanthanide complexes with a symmetric tetradentate ligand

作者：Liu, Qiancai[1]; Huang, Jiling[1]; Qian, Yanlong[1]; Chan, Albert S.C.[2]

机构：[1]E China Univ Sci & Technol, Lab Organometall Chem, POB 421,130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Peoples R China

年份：1999

卷号：18

期号：18

起止页码：2345

外文期刊名：POLYHEDRON

收录：;EI(收录号：20233414577472);WOS:【SCI-EXPANDED(收录号:WOS:000082559500002)】；

语种：英文

外文关键词：organolanthanide complexes; Schiff base; methoxyethylcyclopentadienyl; tetrahydrofurfurylcyclopentadienyl; C-2-symmetry; crystal structure

摘要：LnCl(3) reacted with three equivalents of methoxyethylcyclopentadienyl potassium in tetrahydrofuran (THF), followed by treatment with trans-(+/-)-2,2'-[1,2-cyclohexanediylbis(iminomethyl)] diphenol gave a binuclear mono(methoxyethylcyclopentadienyl)samarium complex [eta(5):eta(1)-Cp'Sm] [(mu:eta-OC20H20N2O)](2)[eta(5)-Cp'Sm] (1), and bis(methoxycyclopentadienyl) ytterbium, [Cp-2'Yb](2)(OC20H20N2O) (2) (Cp' = MeOCH2CH2C5H4). The X-ray determination of complex 1 shows that the molecule is a dimer, in which two (MeOCH2CH2C5H4)Sm(mu:eta-OC20H20N2O) units are connected to two bridging oxygen atoms of Schiff base ligands. The average Sm-C distance is 2.769(7) Angstrom, while that of Sm-O (bridging Schiff base oxygens) is 2.401(4) Angstrom. Further studies on the reaction of Cp-2'DyCl (Cp'H = MeOCH2CH2CpH) with the disodium salt of trans-(+/-)-2.2'-[1,2-cyclohexanediylbis(iminomethyl)]diphenol resulted in an analogue of complex 1: [(MeOCH2CH2C5H4)Dy(OC20H20N2O)](2) (3). However, Cp-2" DyCl reacted with disodium salt of trans-(+/-)-2,2'-[1,2-cyclohexanediylbis(iminomethyl)]diphenol to give rise to the isolation of dinuclear bis(tetrahydrofurfurylcyclopentadienyl) dysprosium complex with one molecular ligand, (Cp-2" Dy)(2)(OC20H20N2O) (4) (Cp " H = C4H7OCH2C5H5). (C) 1999 Elsevier Science Ltd. All rights reserved.