• 作者： Te-Liang Yu, Ching-Huei Huang, Liang-Fu Yang, Bao-Tsan Ko and Chu-Chieh Lin
• 中文摘要： The reaction of 2-methoxybenzyl alcohol with one molar equiv of R2AlX in diethyl ether at 0 oC gives [(2-MeOC6H4CH2-m-O)AlRX]2 (1: R = Et, X = Cl, 2: R = X = Et). In addition, 2,4-di-tert-butylphenol reacts with iBu3Al affording a four-coordinated aluminum compound [(m-2,4-tBu2-C6H4O)Al(iBu)2]2 (4). Single crystal X-ray structure analysis of 4 shows a C2h-symmetry with a planar Al2O2 core. Ring-opening polymerization (ROP) of caprolactones initiated by 1, 4 and [(m-OCH2C6H4OMe)Al(iBu)2]2 (3) is performed and polyesters with narrow molecular weight distributions were obtained from the “living” ROP of caprolactones. 1H NMR spectroscopic studies of PCL reveal that the initiator of 1 and 3 is through the Al-Oar function, but the initiator of 4 is through the Al- iBu group.
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