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Mononuclear and Dinuclear Yttrium Complexes Supported by Pyrrolide Ligands: Syntheses, Structures and Catalytic Behaviors towards the Ring- opening Polymerization of epsilon-Caprolactone
Pei Hao1; Lu Ning1; Liu Wei1; Chen Yan-Mei1; Wu Bing1; Li Hai-Yan1; Li Ya-Hong1; Li Wu2
2016-07-01
Source PublicationCHINESE JOURNAL OF STRUCTURAL CHEMISTRY
Volume35Issue:7Pages:1085-1092
SubtypeArticle
AbstractThe 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-a-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 e-caprolactone initiated by 1 and 2, respectively, were investigated. They both exhibited good catalytic activity for the polymerization of e-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.
KeywordYttrium Pyrrolide Ligand Synthesis Crystal Structure
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSLOW MAGNETIC-RELAXATION ; GROUP-4 METAL-COMPLEXES ; ENANTIOSELECTIVE HYDROAMINATION/CYCLIZATION ; COORDINATION CHEMISTRY ; LANTHANIDE COMPLEXES ; TITANIUM COMPLEXES ; CHIRAL LIGAND ; REACTIVITY ; TRIS(PYRROLYL-ALPHA-METHYL)AMINE ; POLYLACTIDES
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Crystallography
WOS SubjectChemistry, Inorganic & Nuclear ; Crystallography
WOS IDWOS:000385766200013
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6356
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
Affiliation1.Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
Recommended Citation
GB/T 7714
Pei Hao,Lu Ning,Liu Wei,et al. Mononuclear and Dinuclear Yttrium Complexes Supported by Pyrrolide Ligands: Syntheses, Structures and Catalytic Behaviors towards the Ring- opening Polymerization of epsilon-Caprolactone[J]. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY,2016,35(7):1085-1092.
APA Pei Hao.,Lu Ning.,Liu Wei.,Chen Yan-Mei.,Wu Bing.,...&Li Wu.(2016).Mononuclear and Dinuclear Yttrium Complexes Supported by Pyrrolide Ligands: Syntheses, Structures and Catalytic Behaviors towards the Ring- opening Polymerization of epsilon-Caprolactone.CHINESE JOURNAL OF STRUCTURAL CHEMISTRY,35(7),1085-1092.
MLA Pei Hao,et al."Mononuclear and Dinuclear Yttrium Complexes Supported by Pyrrolide Ligands: Syntheses, Structures and Catalytic Behaviors towards the Ring- opening Polymerization of epsilon-Caprolactone".CHINESE JOURNAL OF STRUCTURAL CHEMISTRY 35.7(2016):1085-1092.
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