Four aluminum alkyl compounds, [CH{(CH 3 )CN-2,4,6-MeC 198with the corresponding β-diketiminate, respectively. All compounds were characterized by 1 H NMR and 13 C NMR spectroscopy, singlecrystal X-ray structural analysis, and elemental analysis. Compounds 1-4 were found to catalyze the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) with good activity.

亚胺的锂盐与三甲基氯化锡的反应均以物质的量比为 1∶1 在室温下进行, 分别得到了新化合物 N(Ar)＝C(Me)CH＝ C(NHAr)CH 2 SnMe 2 Cl•C 7 H 8 (1) (Ar ＝ 2,6-i Pr 2 C 6 H 3) 和 [N(Ar')C(Me) ＝ CHC(＝ NAr')CH 2 SnMe 2 ] 2 •CH 2 Cl 2 (2) (Ar' ＝ 2,6-Et 2 C 6 H 3). 通常来说, β-二亚胺配体与金属卤化物反应容易形成氮-金属-氮键, 而化合物 1 和 2 中由于 SnMe 2 Cl 与

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