Zinc Chloride Complexes with Aliphatic and Aromatic Guanidine Hybrid Ligands and Their Activity in the Ring‐Opening Polymerisation of d,l ‐Lactide
| Autor: | Ramona Plothe, Britta Glowacki, Angela Metz, Thomas Rösener, Michael Scheckenbach, Sonja Herres-Pawlis, Andreas Koszalkowski, Andreas Beringer, Janna Michaelis de Vasconcellos, Roxana Haase, Ulrich Flörke, Alexander Hoffmann |
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| Rok vydání: | 2016 |
| Předmět: |
Lactide
010405 organic chemistry Chemistry chemistry.chemical_element Nuclear magnetic resonance spectroscopy Zinc 010402 general chemistry 01 natural sciences Ring-opening polymerization 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Polymer chemistry Molecule Amine gas treating Guanidine Coordination geometry |
| Zdroj: | European Journal of Inorganic Chemistry. 2016:4974-4987 |
| ISSN: | 1099-0682 1434-1948 |
| DOI: | 10.1002/ejic.201600870 |
| Popis: | The synthesis of the new hybrid guanidine ligands DMEGdmap, DMEGdeae, TMGdmab, DMEGdmab, TMGdeab and DMEGdeab is reported. These ligands were combined with zinc chloride, and the six obtained new complexes were structurally characterised by X-ray crystallography and NMR spectroscopy. Further six new zinc chloride complexes were obtained from the hybrid guanidine ligands TMGdmae, DMEGdmae, TMGdeae, TMGdmap, TMGdeap and TEGdeap. Each of the twelve complexes possesses a tetrahedral coordination geometry. The donor situation between guanidine and amine donors was evaluated by use of density functional theory. These complexes show robust activity in the melt polymerisation of technical unsublimed lactide. For selected complexes kinetic polymerisation experiments were performed; these showed first-order behavior. The end-group was established by NMR spectroscopy. |
| Databáze: | OpenAIRE |
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