A radical-bridged bis(ferrocenylcopper(I)) complex: Structural identity, multifrequency EPR, and spectroelectrochemistry.
The paramagnetic blue complex {\{}($μ$-adcOtBu)[Cu(dppf)]2{\}}(PF6) contains two heterodinuclear 1,1'-bis(diphenylphosphinoferrocene)copper(I) moieties, bridged by the radical anion of di-tert-butylazodicarboxylic ester (adcOtBu). The assignment of oxidn. states is supported by crystal structure detn. and by variable frequency EPR spectroscopy which provides hyperfine (9.5 GHz) and g anisotropy information (285 GHz). Cyclic voltammetry and UV/visible/NIR spectroelectrochem. indicate reversible 1-electron oxidn. of the adcOtBu·- bridge prior to the quasi-reversible two-electron oxidn. of the well sepd. (12.55 {\AA}) ferrocene termini. One-electron redn. to the adcOtBu2- bridged system occurs with concomitant loss of the long-wavelength metal-to-ligand charge transfer absorption. [on SciFinder(R)]
Références
- Titre
- A radical-bridged bis(ferrocenylcopper(I)) complex: Structural identity, multifrequency EPR, and spectroelectrochemistry.
- Type de publication
- Article de revue
- Année de publication
- 2008
- Auteurs
- Roy, Sayak, Sieger Monika, Singh Priti, Niemeyer Mark, Fiedler Jan, Duboc Carole, and Kaim Wolfgang.
- Revue
- Inorganica Chim. Acta
- Volume
- 361
- Pagination
- 1699–1704
- ISSN
- 0020-1693
- Mots-clés
- crystal structure dicopper diphosphinoferrocene azodicarboxylate radical bridged complex dicopper diphosphinoferrocene azodicarboxylate radical bridged complex prepn structure electrochem dicopper diphosphinoferrocene azodicarboxylate radical bridged complex spectroelectrochem dicopper diphosphinoferrocene azodicarboxylate radical bridged complex
Soumis le 12 avril 2018