Synthesis and structures of copper(II) complexes containing N,N-bidentate N-substituted phenylethanamine derivatives as pre-catalysts for heterotactic-enriched polylactide
| Autor: | Saira Nayab, Min Kyung Chun, Juhyun Cho, Jong Hwa Jeong |
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| Rok vydání: | 2019 |
| Předmět: |
Denticity
010405 organic chemistry Chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences Copper 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Polymerization Polymer chemistry Alkoxide Materials Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Polyhedron. 163:54-62 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2019.02.014 |
| Popis: | A series of Cu(II) complexes, [LnCuCl2]2 (Ln = (S)-N-((1H-pyrazol-1-yl)methyl)-1-phenylethanamine (L1), (S)-N-((3,5-dimethyl-1H-pyrazol-1-yl)methyl)-1-phenylethanamine (L2) and (S)-1-phenyl-N-((pyridin-2-yl)methyl)ethanamine (L3)) were synthesised and characterised. X-ray diffraction analysis revealed that the molecular structures of these distorted square planar Cu(II) complexes were dimeric with two asymmetric units crystallised in the (SC, SN) and (SC, RN) configurations. These are rare examples of dimeric Cu(II) complexes. The alkoxide derivatives, generated in situ, catalysed the ring-opening polymerisation of rac-lactide in a controlled fashion and displayed high activities (2 or 3 min for complete conversion). Heterotactic-enriched polylactide (with Pr up to 0.86) was formed using these initiators at room temperature in CH2Cl2. |
| Databáze: | OpenAIRE |
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