| Revue: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000199605 |
| ISSN: | 0100-4042 |
| Autores: | Cesarin-Sobrinho, Dari1 Netto-Ferreira, Jose Carlos |
| Instituciones: | 1Universidade Federal Rural do Rio de Janeiro, Departamento de Quimica, Seropedica, Rio de Janeiro. Brasil |
| Año: | 2002 |
| Periodo: | Ene-Feb |
| Volumen: | 25 |
| Número: | 1 |
| Paginación: | 62-68 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, descriptivo |
| Resumen en inglés | Chalcone and its fluorinated derivatives were synthesized and photolyzed in the solid state. UV irradiation of chalcone and its monosubstituted fluorine derivatives (3- and 4-fluorchalcone) resulted in a mixture of anti-head-head (g-truxinic), sin-head-tail (a-truxilic) and anti-head-tail (e-truxilic) dimers. On the other hand, upon irradiation of 3,4- and 3,5-difluorchalcone a stereoselective formation of the a-truxilic photodimer was observed, whereas for 2-substituted chalcones (2,3difluorchalcone, 2,5-difluorchalcone, 2,6-difluorchalcone and 2,3,4-trifluorchalcone) the b-truxilic dimer was stereoselectively obtained. 2',3',4',5',6'-pentafluorchalcone was the less reactive of all chalcones studied and at least one of the possible photodimers, i.e the anti-head-head isomer, was identified. Irradiation of polyfluorinated chalcones such as 2,3,5,6-tetrafluor-, 2,3,4,5,6-pentafluor-, and 2,2',3,3',4,4',5,5',6,6'-decafluorchalcone led only to polymerization and/or decomposition products |
| Disciplinas: | Química |
| Palabras clave: | Química analítica, Química inorgánica, Química orgánica, Estado sólido, Chalconas, Fotodimerización, Derivados fluorados, Fotorreacciones |
| Keyword: | Chemistry, Analytical chemistry, Inorganic chemistry, Organic chemistry, Solid state, Chalcones, Photodimerization, Fluorinated derivatives, Photoreactions |
| Texte intégral: | Texto completo (Ver HTML) |
