Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 2, Pages 972-981Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj05007e
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Funding
- Elite Network of Bavaria
- Friedrich Schiller University Jena
- Deutsche Forschungsgemeinschaft (DFG) [KR4782/3-1]
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Eight dinuclear methyl aluminium complexes were synthesized, characterized, and converted successfully. X-ray diffraction analysis provided the solid-state structures of eleven complexes. The catalytic activity of two complexes in ring-opening polymerization was influenced by metal-metal separation and ligand backbone.
Eight dinuclear methyl aluminium(iii) bis(amidinate) and bis(guanidinate) complexes have been synthesized in good to very good yields and were fully characterized by means of H-1, C-13, and IR spectroscopy as well as elemental analysis. Five of them were successfully converted to the respective dinuclear aluminium iodide complexes and a dinuclear aluminium chloride bis(amidinate) complex was directly accessed by deprotonation of the ligand using ethyl aluminium dichloride. The molecular solid-state structures of eleven complexes were obtained from X-ray diffraction analysis. Furthermore, the catalytic activity of the dinuclear methyl aluminium complexes 3 and 4 has been probed in the ring-opening polymerization of epsilon-caprolactone and l-lactide and the results highlight the impact of the metal-metal separation and the ligands' backbone on activity and selectivity.
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