Organolanthanides with 3-(2-pyridylmethyl) indenyl ligands: synthesis, crystal structures and catalytic activities of divalent complexes for epsilon-caprolactone polymerization

Cheng JH; Cui DM; Chen WQ; Hu NH; Tang T; Huang BT

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Organolanthanides with 3-(2-pyridylmethyl) indenyl ligands: synthesis, crystal structures and catalytic activities of divalent complexes for epsilon-caprolactone polymerization

机译：具有3-（2-吡啶基甲基）茚基配体的有机酚类化合物：ε-己内酯聚合的二价配合物的合成，晶体结构和催化活性

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Reaction of 3-(2-pyridylmethyl)indenyl lithium (1) with LnI(2)(THF)(2) (Ln = Sm, Yb) in THF produced the divalent organolanthanides (C5H4NCH2C9H6)(2)Ln(II)(THF) (Ln = Sm (2), Yb (3)) in high yield. 1 reacts with LnCl(3) (Ln = Nd, Sm, Yb) in THF to give bis(3-(2-pyridylmethyl)indenyl) lanthanide chlorides (C5H4NCH2C9H6)(2)Ln(III)Cl (Ln = Nd (4), Sm (5)) and the unexpected divalent lanthanides 3 (Ln = Yb). Complexes 2-5 show more stable in air than the non-functionalized analogues. X-ray structural analyses of 2-4 were performed. 2 and 3 belong to the high symmetrical space group (Cmcm) with the same structures, they are THF-solvated 9-coordinate monomeric in the solid state, while 4 is an unsolvated 9-coordinate monomer with a trans arrangement of both the side-arms and indenyl rings in the solid state. Additionally, 2 and 3 show moderate polymerization activities for F-caprolactone (CL). (C) 2004 Elsevier B.V. All rights reserved.

机译：3-（2-吡啶基甲基）茚基锂（1）与LnI（2）（THF）（2）（Ln = Sm，Yb）在THF中反应生成二价有机镧系元素（C5H4NCH2C9H6）（2）Ln（II）（THF））（Ln = Sm（2），Yb（3））高产。 1在THF中与LnCl（3）（Ln = Nd，Sm，Yb）反应生成双（3-（2-吡啶基甲基）茚基）镧系元素氯化物（C5H4NCH2C9H6）（2）Ln（III）Cl（Ln = Nd（4 ），Sm（5））和意外的二价镧系元素3（Ln = Yb）。络合物2-5在空气中比未官能化的类似物更稳定。进行2-4的X射线结构分析。 2和3属于具有相同结构的高对称空间基团（Cmcm），它们是THF溶剂化的9配位单体，处于固态，而4是未溶剂化的9配位单体，且两侧均反式排列臂和茚基环处于固态。另外，2和3对F-己内酯（CL）表现出中等的聚合活性。（C）2004 Elsevier B.V.保留所有权利。

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《Journal of Organometallic Chemistry》 |2004年第16期|共8页
作者
Cheng JH; Cui DM; Chen WQ; Hu NH; Tang T; Huang BT;
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正文语种 eng
中图分类有机化学;
关键词
3-(2-pyridylmethyl) indenyl; divalent lanthanides; crystal structure; epsilon-caprolactone; CYCLOPENTADIENYL COMPLEXES; LANTHANOCENE CHLORIDES; N BOND; YB; LN; SM; YTTERBIUM(II); SAMARIUM(II); LANTHANIDES; HOMOLYSIS;

机译：3-（2-吡啶基甲基）茚基;二价镧系元素;晶体结构;ε-己内酯;环戊二烯基络合物;环茂氯;N键;YB;LN;SM;Y（II）;SA（II）;镧系元素;

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机译：具有3-（2-吡啶基甲基）茚基配体的有机酚类化合物：ε-己内酯聚合的二价配合物的合成，晶体结构和催化活性
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Organolanthanides with 3-(2-pyridylmethyl) indenyl ligands: synthesis, crystal structures and catalytic activities of divalent complexes for epsilon-caprolactone polymerization

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