| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313215 |
| ISSN: | 0100-4042 |
| Authors: | Barreto, Wagner Jose1 Barreto, Sonia Regina Giancoli Moreira, Ivanira Kawano, Yoshio2 |
| Institutions: | 1Universidade Estadual de Londrina, Departamento de Quimica, Londrina, Parana. Brasil 2Universidade de Sao Paulo, Instituto de Quimica, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Nov |
| Volumen: | 29 |
| Number: | 6 |
| Pages: | 1255-1258 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The reaction of 1,2-dihydroxy-benzene (pyrocatechol) (C6H6O2) with iron oxide (Fe2O3) and sodium thiosulfate (Na2S2O3) in aqueous medium (pH 7) was investigated. Pyrocatechol suffers autoxidation and coordinates with Fe3+ in solution. The presence of S2O3(2-) in solution was fundamental to generate and stabilize the pyrocatechol oxidation products as o-semiquinones. This compound was isolated and its structure characterized using FT-IR, EPR and UV-Vis Spectroscopy as [CTA][Fe(SQ)2(Cat)]. A thermal mass loss mechanism was proposed based on Thermogravimetric Analysis (TG) to support the structural characterization |
| Disciplines: | Química |
| Keyword: | Química orgánica, Pirocatecol, Oxido de hierro, Tiosulfato de sodio |
| Keyword: | Chemistry, Organic chemistry, Pyrocatechol, Iron oxide, Sodium thiosulfate |
| Full text: | Texto completo (Ver HTML) |
