RAMAN STUDIES OF BIS(PHENYLTERPYRAZINE)IRON(II) AND SUPRAMOLECULAR SPECIES WITH PENTACYANIDOFERRATE(II) IONS
| Autor: | Ana P. Mangoni, Bruno B. N. S. Brandão, Jorge S. Shinohara, Alceu T. Silveira, Marcelo Nakamura, Henrique E. Toma |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
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| Zdroj: | Química Nova |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.21577/0100-4042.20170415 |
| Popis: | The chemistry and spectroscopy of the iron(II) phenylterpyrazine complex, [Fe(phtpz)2]2+, were investigated in comparison with the analogous phenylterpyridine species, Fe(phtpy)2]2+, and the results indicated a strong electronic delocalization on the Fe(II) terimine chromophore encompassing the lateral pyrazyl groups. The delocalized nature of the molecular orbitals involved in the electronic excitation precluded a direct assignment of the pyridine and pyrazine vibrations in the complex. However, the capability of the terpyrazine complex to bind transition metal ions, such as the [Fe(CN)5]3- species, allowed to generate pentanuclear complexes displaying characteristic charge-transfer and resonance Raman spectra, revealing the pyrazine vibrations in the complex. The [Fe(CN)5]3- containing species also yielded polymeric compounds in presence of transition metal ions, exhibiting intervalence transfer bands and chemical similarities with the Prussian Blue complex. |
| Databáze: | Directory of Open Access Journals |
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