Electron-Deficient β-Diiminato-Zinc-Ethyl Complexes: Synthesis, Structure, and Reactivity in Ring-Opening Polymerization of Lactones

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• 作者：Alexander Kronast ; Marina Reiter ; Peter T. Altenbuchner ; Christian Jandl ; Alexander Pöthig ; Bernhard Rieger
• 刊名：Organometallics
• 出版年：2016
• 出版时间：March 14, 2016
• 年：2016
• 卷：35
• 期：5
• 页码：681-685
• 全文大小：287K
• ISSN：1520-6041

文摘

A series of β-diiminato zinc(II) complexes bearing two electron-withdrawing trifluoromethyl groups in the pentane ligand backbone were successfully isolated ((BDI^CF₃-I)H = [CH(CCF₃NC₆H₄-2,6-CH(CH₃)₂)₂]; (BDI^CF₃-II)H = [CH(CCF₃NC₆H₄-2,6-C₂H₅)₂], and (BDI^CF₃-III)H = [CH(CCF₃NC₆H₄-2,6-CH₃)₂]). The solid-state structures illustrate differences in the ligation of the Zn atom compared to a literature known BDI-ZnEt complex. All catalysts show good activities in the ring-opening polymerization of the cyclic ester (rac)-β-butyrolactone (BL), whereas only BDI^CF₃-II-ZnEt and BDI^CF₃-III-ZnEt are active initiators for the polymerization of (rac)-lactide (LA).