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Mou Zehuai,Xing Fangyu,Gu Jialu 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.5
The halogenated β-diketiminato magnesium butyl complexes LXMgBu(THF) (X = Cl (1), Br (2)) and allyl complexes LXMg(allyl)(THF) (X = Cl (3), Br (4)) (LCl = ((2,6-Cl2C6H3)N═C(Me)CH═C(Me)N(2,6-Cl2C6H3)), LBr = ((2,6-Br2C6H3)N═C (Me)CH═C(Me)N(2,6-Br2C6H3)) were prepared and characterized. The treatment of butyl complex 2 with (S)-1-phenylethanol gave the corresponding alkoxide complex [LBrMgOCHMePh]2 (5), the dimeric structure of which was confirmed by single-crystal x-ray diffraction. When bulky diphenylmethanol was employed to react with Complex 2, THF-ligated monomeric complex LBrMgOCHPh2(THF) (6) was afforded. The catalytic performances of these magnesium complexes for ring-opening polymerization of ε-caprolactone (ε-CL), δ-valerolactone (δ-VL), and γ-butyrolactone (γ-BL) were evaluated.