Crystal Structures of Missing Links in the Early History of Solid-State Reactions: The Group IA Acrylates and Methacrylates
| Autor: | Chung-Hsin Chen, Jeremy B. Heyman, Bruce M. Foxman |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Acrylate
010405 organic chemistry Potassium Radical polymerization chemistry.chemical_element General Chemistry 010402 general chemistry Condensed Matter Physics Alkali metal Methacrylate 01 natural sciences 0104 chemical sciences Rubidium chemistry.chemical_compound Methacrylic acid chemistry Polymer chemistry General Materials Science Lithium |
| Zdroj: | Crystal Growth & Design. 20:330-336 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.9b01267 |
| Popis: | The crystal structures of potassium acrylate and related compounds studied by the group of Herbert Morawetz (1915-2017) have remained unknown for 60 years. 60Co γ-irradiation of potassium acrylate, the most reactive of all materials studied, affords high yields of polyacrylate, with molecular weights in the range 120,000 – 400,000. At the present time, the only alkali metal salts of acrylic and methacrylic acid whose structures appear in the Cambridge Structural Database are those of lithium. We report five new crystal structures: potassium acrylate (1), potassium methacrylate (2), potassium hydrogen dimethacrylate (3), rubidium hydrogen dimethacrylate (4), and sodium dihydrogen trimethacrylate (5). The discussion focuses on metal coordination, proposed reaction pathways for radical polymerization in the solid state, and possible reasons for differences in acrylate vs. methacrylate reactivity. |
| Databáze: | OpenAIRE |
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