Aluminum alkyl complexes containing bidentate, mono- or di-anionic pyrrolyl ligands: Intramolecular elimination of methane and 1-hexene polymerization

Chong Chin Zhou, Chen Hsiung Hung, Jui Hsien Huang, Ting Yu Lee

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Abstract

A series of aluminum alkyl complexes were synthesized and their catalytic polymerization reactivity toward 1-hexene was studied. Aluminum complexes, [C4H3N(CH2NHMe)-2]AlR2 (1a, R = Me; 1b, R = Et), containing substituted pyrrolyl ligand can be prepared by reacting AlR3 with one equiv of C4H3NH(CH 2NHMe)-2 in diethyl ether at room temperature. Dimeric aluminum complexes, {[C4H3N(CH2NMe)-2]AlR}2 (2a, R = Me; 2b, R = Et), can be obtained via metathesis by heating AlR 3 and with one equiv of [C4H3NH(CH 2NHMe)-2] in toluene for 24 h or via intramolecular methane elimination by heating 1 and 2 at 90 °C in toluene. Complexes 1a, 1b, 2a, and 2b have been characterized by NMR spectroscopy and by X-ray crystallography. Complexes 1a and 2a have shown moderate reactivity for 1-hexene polymerization in the presence of MAO.

Original languageEnglish
Pages (from-to)1297-1302
Number of pages6
JournalJournal of the Chinese Chemical Society
Volume53
Issue number6
DOIs
Publication statusPublished - 2006 Jan 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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