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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Methylaluminium 8-quinolinolates: Synthesis, characterization and use in ring-opening polymerization (ROP) of ε-caprolactone
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Methylaluminium 8-quinolinolates: Synthesis, characterization and use in ring-opening polymerization (ROP) of ε-caprolactone

机译：8-喹啉甲基铝：ε-己内酯的合成，表征和在开环聚合（ROP）中的用途

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摘要

The stoichiometric reactions of 2-(2, 6-R-phenylimino)quinolin-8-ol (L1-L5, L1: R = Me, L2: R = Et, L3: R = iPr, L4: R = Cl, L5: R = F) with Me3Al afforded the dimeric aluminium complexes [Me 2AlL]2 (1-5) in good yields. By contrast, stoichiometric reactions of 2-(1-(2, 6-R-phenylimino)propyl) quinolin-8-ol (L6-L10, L6: R = Me, L7: R = Et, L8: R = iPr, L9: R = Cl, L10: R = F)) with Me 3Al gave the mononuclear aluminium complexes Me2AlL (6-10) accompanied with by-products of the form Me2AlL·Me 3Al (11-15). All methylaluminium complexes were characterized by NMR spectroscopy, elemental analysis, and the molecular structures of complexes 3, 6 and 8 were determined by single-crystal X-ray diffraction. Aluminium compounds 1-5 possessed negligible activity towards the ring-opening polymerization of ε-caprolactone either in the presence or absence of BnOH. In contrast, in the presence of BnOH, the mononuclear aluminium compounds 6-10 could efficiently initiate the ring-opening polymerization of ε-caprolactone; the polymerization proceeded in a living manner.
机译：2-（2,6-R-苯基亚氨基）喹啉-8-ol（L1-L5，L1：R = Me，L2：R = Et，L3：R = iPr，L4：R = Cl，L5 ：R ＝ F）与Me 3 Al一起以良好的收率得到二聚铝配合物[Me 2 AlL] 2（1-5）。相反，2-（1-（2，6-R-苯基亚氨基）丙基）喹啉-8-醇的化学计量反应（L6-L10，L6：R = Me，L7：R = Et，L8：R = iPr， L 9：R ＝ Cl，L 10：R ＝ F））与Me 3 Al一起得到单核铝络合物Me 2 AlL（6-10）以及副产物Me 2 AlL·Me 3Al（11-15）。所有甲基铝配合物均通过NMR光谱，元素分析进行​​表征，配合物3、6和8的分子结构通过单晶X射线衍射确定。在存在或不存在BnOH的情况下，铝化合物1-5对于ε-己内酯的开环聚合具有微不足道的活性。相反，在BnOH的存在下，单核铝化合物6-10可以有效地引发ε-己内酯的开环聚合。聚合以活性方式进行。

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