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|標題:||Alcoholysis of methyl aluminium biphenoxides: Excellent initiators for the ring opening polymerisation of epsilon-caprolactone||作者:||Liao, T.C.
|關鍵字:||initiators;NMR;ring-opening polymerization;lewis-acid;2,2-dimethyltrimethylene carbonate;immortal;polymerizations;anionic-polymerization;living polymerization;aryloxide compounds;hydrogen-transfer;l-lactide;lactones;copolymers||Project:||Macromolecular Chemistry and Physics||期刊/報告no：:||Macromolecular Chemistry and Physics, Volume 204, Issue 5-6, Page(s) 885-892.||摘要:||
Several aluminium alkoxides are prepared, and their catalytic activities toward ring-opening polymerisation of epsilon-caprolactone have been investigated. The reaction of [(mu-EDBP)AlMe](2) (EDBP-H-2: 2,2'-ethylidenebis(4,6-di-tert-butylphenol))) with 2 molar equiv. of monomethylethylene glycol yields a five-coordinated dimeric aluminium complex, [(EDBP)Al(mu-OCH2CH2OCH2CH2OMe)](2) (1). [(mu-EDBP)AlMe](2) reacts with 2 molar equiv. of alcohol in toluene at ambient temperature to give a four-coordinated dimeric aluminium complex, [(EDBP)Al(mu-OR)](2) (2: R = Me; 3: R = Et; 4: R = 4-MeO-C6H4). However, the reaction of [(mu-EDBP)AlMe](2) with 2 molar equiv. of benzhydrol in tetrahydrofuran (THF) gives a four-coordinate monometric complex, [(EDBP)Al(OCHPh2)(THF)] (5).
|Appears in Collections:||化學系所|
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