Tetranuclear complexes of group 12 and 13 supported on a polynucleating ligand and activity studies in the ROP of rac-lactide
| Autor: | Dolores-Judith Caballero-Jiménez, Nazario Lopez, Omar-Jorge García-de-Jesús, Yasmi-Graciela Reyes-Ortega, Miguel-Ángel Muñoz-Hernández |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Denticity
Lactide 010405 organic chemistry Stereochemistry Chemistry Ligand Cooperativity 010402 general chemistry 01 natural sciences 0104 chemical sciences Catalysis Inorganic Chemistry Metal chemistry.chemical_compound Polymerization Group (periodic table) visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry |
| Zdroj: | Inorganica Chimica Acta. 489:120-125 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2019.02.007 |
| Popis: | A polynucleating ligand (L-H4) containing four N,O bidentate sites was cleanly metallated by four equivalents of AlMe3, GaMe3 and ZnEt2 resulting in tetranuclear complexes L(MMe2)4 (M = Al (1), Ga (2)) and L(ZnEt(CH3CN)0.5)4 (3). The Al complex shows the best catalytic activity for the ring-opening polymerization (ROP) of rac-lactide (rac-LA) in the present family of tetranuclear compounds. Polymerization studies indicate the lack of cooperativity between metal centers in the ROP of rac-LA, despite having a ligand platform which binds to four metal centers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect