Hafnium chloride and hafnium methyl complexes bearing substituted pyrrolyl ligands: Synthesis, characterization, and ethylene polymerization

Kun Chun Hsieh, Jr Chiuan Chang, Ming Tsung Lee, Ching Han Hu, Chen Hsiung Hung, Hon Man Lee, Jui Hsien Huang, Mei Hua Wang, Ting Yu Lee

研究成果: Article

8 引文 斯高帕斯(Scopus)

摘要

Reactions of HfCl4 with 2 and 3 equiv. of Li[C4H 3N(CH2NMe2)-2] in toluene afford HfCl 2[C4H3N(CH2NMe2)-2] 2 (1) and HfCl[C4H3N(CH2NMe 2)-2]3 (2), respectively. Transmetallation reaction of 1 with 2 equiv. of MeLi results in a hafnium dimethyl compound HfMe 2[C4H3N(CH2NMe2)-2] 2 (3). A variable-temperature 1H NMR spectroscopic study shows that the activation energy for the dissociation/association of the NMe2 units of compound 2 in solution is ca. 13.6 kcal/mol. Compounds 1-3 are characterized by NMR spectroscopy and single crystal X-ray diffraction. A polymerization study shows that compounds 1 and 3 exhibit moderate activity toward ethylene in the presence of TIBA and MAO.

原文English
頁(從 - 到)3517-3524
頁數8
期刊Inorganica Chimica Acta
357
發行號12
DOIs
出版狀態Published - 2004 九月 10

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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