Complexes Supported by Pyrrolide Ligands:Syntheses, Structures and Catalytic Behaviors towards the Ring-opening Polymerization of <em>ε</em>-Caprolactone

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The syntheses, structures and catalytic activities of two yttrium complexes sup- ported by pyrrolide ligands are reported. Treatment of Y(N(SiMe3)2)3 with one equivalent of H3bptd (H3bptd = 1,9-bis(2-pyrrolyl)-2,5,8-triazanona-1,8-diene) in THF gave a complex of composition [Y(bptd)(THF)]2 (1). Reaction of Y(N(SiMe3)2)3 with one equivalent of H3tpa (H3tpa = tris(pyrrolyl--methyl)amine) in THF generated [Y(tpa)(THF)3] (2) in good yield. Complexes 1 and 2 have been characterized by single-crystal X-ray diffraction, elemental analyses and NMR spectroscopy. Complex 1 is dinuclear. The two metal centers are doubly bridged by two amine nitrogen atoms to form a Y–N–Y–N four-membered rhombus ring. The geometries of Y3+ ions in 1 and 2 are well described as pentagonal bipyramid and capped octahedron, respectively. The ring-opening polymerization reactions of -caprolactone initiated by 1 and 2, respectively, were investigated. They both exhibited good catalytic activity for the polymerization of -caprolactone. All of the obtained polymers have high molecular weights and relatively narrower PDIs. The polymers generated by 2 possessed polydispersity close to 1.1. The good catalytic activities of 1 and 2 reveal their potential applications in polymer industry.

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	裴浩
	陆宁
	刘玮
	陈砚美
	吴冰
	李海燕
	李亚红
	李武

关键词 ： yttrium, pyrrolide ligand, synthesis, crystal structure, ring-opening polymerizatio

Abstract：

Key words： yttrium pyrrolide ligand synthesis crystal structure ring-opening polymerizatio

收稿日期: 2015-09-21 出版日期: 2016-07-12

基金资助:

Supported by NNSFC (21272167), the Priority Academic Program Development of Jiangsu Higher Education Institution, and KLSLRC (KLSLRC-KF-13-HX-1)

通讯作者: liyahong@suda.edu.cn E-mail: liyahong@suda.edu.cn

引用本文:

裴浩;陆宁;刘玮;陈砚美;吴冰;李海燕;李亚红;李武. Complexes Supported by Pyrrolide Ligands:Syntheses, Structures and Catalytic Behaviors towards the Ring-opening Polymerization of ε-Caprolactone[J]. 结构化学, 2016, 35(7): 1085-1092.
PEI Hao;LU Ning; LIU Wei;CHEN Yan-Mei;WU Bing;LI Hai-Yan;LI Ya-Hong;LI Wu. Complexes Supported by Pyrrolide Ligands:Syntheses, Structures and Catalytic Behaviors towards the Ring-opening Polymerization of ε-Caprolactone. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2016, 35(7): 1085-1092.

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http://manu30.magtech.com.cn/jghx/CN/ 或 http://manu30.magtech.com.cn/jghx/CN/Y2016/V35/I7/1085

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