| Revue: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000198162 |
| ISSN: | 0100-4042 |
| Autores: | Haddad, Paula S1 Mauro, Antonio E Frem, Regina C.G |
| Instituciones: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Quimica de Araraquara, Araraquara, Sao Paulo. Brasil |
| Año: | 2001 |
| Periodo: | Nov-Dic |
| Volumen: | 24 |
| Número: | 6 |
| Paginación: | 786-789 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Tetrahydroborate complexes of copper (I) with bidentate phosphines, [Cu(h2-BH4)(dppm)] (1), [Cu(h2-BH4)(dppe)] (2), [Cu(h2-BH4)(cis-dppet)] (3) and [Cu(h2-BH4)(dppb)] (4) (dppm = bis(diphenylphosphino)methane; dppe = 1,2-bis(diphenylphosphino) ethane; cis-dppet = 1,2-cis(diphenylphosphino)ethene; dppb = 1,4-bis(diphenylphosphino)butane) were prepared and characterized by elemental analysis, infrared spectroscopy, NMR and thermogravimetric analysis. The IR data for 1-4 showed bands typical of a bidentate coordination of BH4 group to the copper atom and the 31P{1H} NMR spectra indicated that the phosphorous atoms are chelating the metal centre. The thermal behavior of the compounds was investigated and suggested that their thermal stability is influenced by the phosphines. Their thermal stability decreased as follows: [Cu(h2-BH4)(dppe)] (2) > [Cu(h2-BH4)(dppm)] (1) > [Cu(h2-BH4)(dppb)] (4) > [Cu(h2-BH4)(cis-dppet)] (3). According to thermal analysis and X-ray diffraction patterns all compounds decomposed giving Cu(BO2)2, CuO, CuO2 and Cu as final products |
| Disciplinas: | Química |
| Palabras clave: | Química analítica, Química inorgánica, Tetrahidroborato, Difosfinas, Caracterización, Espectroscopía, Cobre, Complejos de cobre |
| Keyword: | Chemistry, Analytical chemistry, Inorganic chemistry, Tetrahydroborate, Diphosphines, Characterization, Spectroscopy, Copper, Complexes of copper |
| Texte intégral: | Texto completo (Ver HTML) |
