In their work reported on page 2104, Praban and colleagues prepared a series of tin(II) complexes supported by N₂O₂ bis(phenol)‐amine ligands from the reactions of Sn[N(SiMe₃)₂]₂ with the corresponding ligands having different substituents on the aryl rings and N‐containing side arm. All complexes were active for solvent‐free polymerization of L‐lactide at 120 °C, giving poly(L‐lactide) with narrow to moderate dispersity. When benzyl alcohol was present during the polymerization, the resulting polymer was found to be linear with benzyl alcohol as the end group. In the absence of benzyl alcohol, the obtained polymer had a cyclic structure. (DOI: 10.1002/pola.29479)

中文翻译：

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封面图片，第57卷，第20期

在第2104页的工作报告中，Praban及其同事通过Sn [N（SiMe ₃）₂ ] ₂与相应的反应制备了一系列由N ₂ O ₂双（酚）-胺配体支撑的锡（II）配合物。在芳环和含N侧臂上具有不同取代基的配体 所有络合物均对120°C的L-丙交酯无溶剂聚合反应具有活性，从而形成聚L-丙交酯），具有窄至中等的分散度。当在聚合过程中存在苯甲醇时，发现所得聚合物以苯甲醇为端基为线性。在不存在苯甲醇的情况下，获得的聚合物具有环状结构。（DOI：10.1002 / pola.29479）