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Details van artikel 37 van 116 gevonden artikelen
| Titel: |
ELECTRONIC STRUCTURE OF CYANO-BRIDGED DINUCLEAR IRON COMPLEXES |
| Auteur: |
Souto, M. Fernanda Cukiernik, Fabio D. Forlano, Paula Olabe, Jose A. |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 54 (2001) nr. 3-4 pagina's 343-353 |
| Jaar: |
2001-11-01 |
| Inhoud: |
A series of complexes of formula [(NC)5FeII—NC—FeII(CN)4L]n-, with L = H2O, pyridine, isonicotinamide and 4-cyanopyridine were prepared in aqueous solution by substitution of the corresponding [FeII(CN)5L]n- ions into [FeII(CN)5H2O]3-. The mixed valent (II, III) and fully oxidized (III, III) complexes were also obtained. The (II, II) complexes were moderately stable toward dissociation into the mononuclear species, but the mixed-valent ions were properly characterized by UV-vis-NIR spectroscopy and electrochemistry. Distinctive intervalence (IV) bands were assigned in the NIR region, with the energy being dependent on the binding properties of L; the IV band energy also correlated with the redox potential at the [NC—Fe(CN)4L] fragment. By application of the Hush model, a valence-trapped situation was found for the [(NC)5FeIII—NC—FeII(CN)4L]n- ions. The class II behavior shows, however, a value of Hab, the electronic coupling factor, of ca. 1600cm-1, indicating a moderate-to-strong communication between the metal centers. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 37 van 116 gevonden artikelen
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