National Changhua University of Education Institutional Repository : Item 987654321/14769
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題名: Seven-coordinated Tantalum Trichloride Complex Containing Substituted Pyrrolyl Ligand: Synthesis and Characterization of [NC4H3(CH2NMe2)-2]2TaCl3
作者: Zhou, Chong-Chin;Huang, Jui-Hsien;Wang, Mei-Hua;Lee, Ting-Yu;Lee, Gene-Hsiang;Peng, Shie-Ming
貢獻者: 化學系
關鍵詞: Pyrrolyl;Tantalum chloride;Polymerization
日期: 2003-01
上傳時間: 2012-12-10T01:39:29Z
出版者: Elsevier
摘要: bis[2-(Dimethylaminomethyl)pyrrolyl]tantalum chloride (1) was prepared by treatment of the TaCl5 with 2 equiv. of [2-(dimethylaminomethyl)pyrrolyl]lithium. The solid state structure of 1 shows the seven-coordinated tantalum atom, with a geometry corresponding to a pentagonal bipyramidal structure, in which two chlorine atoms occupy the axial position with the angle of 174.8(2)°. Furthermore, variable-temperature 1H NMR spectra infer the fluxionality of the two chelating pyrrolyl ligands with an estimated energy barrier of 13.8 kcal mol−1. Compound 1 shows no catalytic activity toward ethylene polymerization even activated with MAO.
關聯: Inorg. Chim. Acta., 342: 59-63
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