Presentation Title

Polymerization of ϵ-caprolactone by aluminum alkoxide complexes supported by tridentate ketoiminates bearing electron-withdrawing groups

Presentation Type

Poster

Department

Chemistry

Major

Chemistry & English

Abstract

A series of aluminum complexes were prepared from ketoimines bearing electron-withdrawing groups. The aluminum reagent used in this process is in structured such that two of the molecules are bonded together. In contrast to previous studies that using CH2Cl2 as the reaction solvent which yielded the asymmetric splitting of the aluminum reagent, this study utilized THF as the reaction solvent which lead to symmetric splitting. As a result, five-coordinate aluminum complexes composed of a tridentate ketoiminate and two alkoxides were prepared and isolated. The complexes which characterized with 1H, 13C, and 19F NMR and x-ray crystallography and were shown to be a highly effective ϵ-caprolactone polymerization catalysts.

Faculty Mentor

Joseph Fritsch

Funding Source or Research Program

Not Identified

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Polymerization of ϵ-caprolactone by aluminum alkoxide complexes supported by tridentate ketoiminates bearing electron-withdrawing groups

A series of aluminum complexes were prepared from ketoimines bearing electron-withdrawing groups. The aluminum reagent used in this process is in structured such that two of the molecules are bonded together. In contrast to previous studies that using CH2Cl2 as the reaction solvent which yielded the asymmetric splitting of the aluminum reagent, this study utilized THF as the reaction solvent which lead to symmetric splitting. As a result, five-coordinate aluminum complexes composed of a tridentate ketoiminate and two alkoxides were prepared and isolated. The complexes which characterized with 1H, 13C, and 19F NMR and x-ray crystallography and were shown to be a highly effective ϵ-caprolactone polymerization catalysts.