摘要
Rare-earth metal dialkyl complexes[1-Bn-3-(DippN=CH)C_(8)H_(4)N]RE(CH_(2)SiMe_(3))2(thf)2(Dipp=2,6-iPr_(2)C_(6)H_(3),RE=Y(1)and Er(2))were prepared through the cyclometalation reactions of the N-Bn-3-imino-functionalized indolyl ligand 1-Bn-3-(DippN=CH)C8H5N with one equivalent of rare-earth metal trialkyl precursors.The structures of compounds 1 and 2 were confirmed by X-ray crystal analyses and characterized by elemental analysis,IR,NMR spectroscopy wherein applicable.In the presence of cocatalysts,these rare-earth metal dialkyl complexes initiated isoprene polymerization with a high activity(95% conversion of 2000 equivalent of isoprene in 360 min),producing polymers with high regioselectivity(1,4-polymers up to 91%).
作者
GUO Li-Ping
SONG Ren-Yuan
郭立平;宋任远(Anhui Provincial Engineering Laboratory of Silicon-based Materials,Bengbu University,Bengbu 233030,China;The Key Laboratory of Functional Molecular Solids,Ministry of Education,Anhui Normal University,Wuhu 241000,China)
基金
supported by the Natural Science Foundation of Anhui Province(No.2008085ME174)
financial support from Anhui Normal University(FMS201915)。
