Synthesis and Structural Characterisation of Dinuclear Aluminium Complexes Supported by NNO-Tridentate Schiff-Base Ligands and Their Catalysis in the Ring-Opening Polymerisation of ε-Caprolactone

摘要

In this study, we prepared a series of dinuclear aluminium complexes {Bis{2-OAlMe2-3-CH=N[CH2CH2N(CH3)2]-5-CH3C6H2} CH2, Bis[2-OAlMe2-3-CH=N(2-PyCH2)-5-CH3C6H2]CH2, and Bis{2- OAlMe2-3-CH=N[2-N(CH3)2C6H4]-5-CH3C6H2}CH2} as well as their corresponding mononuclear aluminium compounds derived from NNO-tridentate Schiff-base ligands. The compounds were characterised by ~1 H and ~(13) C spectroscopy and elemental analyses. Complexes 4 and 7 were additionally characterised by single-crystal X-ray diffraction. Their activities toward the ring-