| Journal: | Journal of the Brazilian Chemical Society |
| Database: | PERIÓDICA |
| System number: | 000311188 |
| ISSN: | 0103-5053 |
| Authors: | Dall'Oglio, Evandro1 Caro, Miguel B Gesser, Jose C Zucco, César Rezende, Marcos C2 |
| Institutions: | 1Universidade Federal de Santa Catarina, Departamento de Quimica, Florianopolis, Santa Catarina. Brasil 2Universidad de Santiago de Chile, Facultad de Química y Biología, Santiago de Chile. Chile |
| Year: | 2002 |
| Volumen: | 13 |
| Number: | 2 |
| Pages: | 251-259 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The tautomerism of five symmetrically substituted 2,2'-bis-benzimidazoles [5(6),5'(6')-tetramethyl- (1); 5(6),5'(6')-dimethyl-(2); 5(6),5'(6')-dichloro- (3); 5(6),5'(6')-dimethoxy- (4) and 4(7),4'(7')-dimethyl-2,2'-bis-benzimidazole (5)], was studied by means of ¹H NMR spectroscopy at variable temperatures, and the influence of the substituents on the energy barriers for tautomeric interconversion was interpreted with the aid of theoretical calculations |
| Portuguese abstract | O tautomerismo de cinco 2,2'-bis-benzimidazóis, simetricamente substituídos, [5(6),5'(6')-tetrametil- (1); 5(6),5'(6')-dimetil-(2); 5(6),5'(6')-dicloro- (3); 5(6),5'(6')-dimetoxi- (4) e 4(7),4'(7')-dimetil-2,2'-bis-benzimidazol (5)], foi estudado por espectroscopia de ¹H RMN, a várias temperaturas, e a influência dos substituintes nas barreiras energéticas de interconversão tautomérica, interpretada através de cálculos teóricos |
| Disciplines: | Química |
| Keyword: | Química analítica, Benzimidazol, Tautomerismo, Resonancia magnética nuclear |
| Keyword: | Chemistry, Analytical chemistry, Benzimidazole, Tautomerism, Nuclear magnetic resonance |
| Full text: | Texto completo (Ver HTML) |
