Magnesium complexes containing η1- and η3- pyrrolyl or ketiminato ligands: Synthesis, structural investigation and ε-caprolactone ring-opening polymerisation

Li Feng Hsueh, Nien Tsu Chuang, Cheng Yuan Lee, Amitabha Datta, Jui Hsien Huang, Ting Yu Lee

研究成果: Article

29 引文 斯高帕斯(Scopus)

摘要

A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the application of these derivatives for the ring opening polymerisation of ε-caprolactone has been carried out. Reactions of [Mg{N(SiMe3)2}]2 (1) with one equiv. of 2-dimethylaminomethyl pyrrole and 2-diethylaminomethyl pyrrole in toluene generates [Mg{C4H3N(2-CH2NMe 2)}{N(SiMe3)2}]2 (2) and [Mg{C 4H3N(2-CH2NEt2)}{N(SiMe 3)2}]2 (3), respectively, in high yield. Similarly, the reaction of 1 with one equiv. of 2-tert-butylaminomethyl pyrrole in toluene at room temperature affords [Mg{C4H3N(2-CH 2NHtBu)}{N(SiMe3)2}]2 (4). Furthermore, reactions of 1 with one equiv. of HOCMeCHCMeN(C6H 3-2,6-iPr2) or HOCMeCHCMeN(C6H 4-2-OMe) in toluene yielded the dimeric magnesium complexes, [Mg{OCMeCHCMeN(C6H3-2,6-iPr2)}{N(SiMe 3)2}]2 (5) and [Mg{OCMeCHCMeN(C 6H4-2-OMe)}{N(SiMe3)2}]2 (6), respectively, in satisfactory yields by means of deamination. All the complexes were characterised by NMR spectroscopy and X-ray diffraction analysis in the solid state. They show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran. A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the compounds were evaluated as catalytic precursors. The complexes show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran.

原文English
頁(從 - 到)5530-5537
頁數8
期刊European Journal of Inorganic Chemistry
發行號36
DOIs
出版狀態Published - 2011 十二月 1

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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