Novel Complexes trans(Cl)-[Os(bpy)(CO)(CH3CN)Cl2]n (n = 0, +1; bpy = 2,2′-Bipyridine): Photo- and Electrochemical Syntheses and Comparative Study of Their Bonding and Redox Properties
✍ Scribed by Sylvie Chardon-Noblat; Philippe Da Costa; Alain Deronzier; Taasje Mahabiersing; František Hartl
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 139 KB
- Volume
- 2002
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Photoirradiation of the complex trans(Cl)-[Os(bpy)(CO) 2 Cl 2 ] in acetonitrile with λ Ն 320 nm light gives rise to substitution of a CO ligand, with the formation of trans(Cl)-[Os(bpy)-(CO)(CH 3 CN)Cl 2 ]. The bonding properties and redox reactions of the novel photoproduct were thoroughly investigated by several methods such as nanosecond time-resolved UV/Vis absorption and resonance Raman spectroscopy, cyclic voltammetry, and IR and UV/Vis spectroelectrochemistry. Its one-electron electrochemical oxidation in acetonitrile produces the stable cation trans(Cl)-[Os(bpy)(CO)(CH 3 CN)Cl 2 ] + . This complex is also formed as the major product during oneelectron oxidation of the dicarbonyl precursor trans(Cl)-[Os(bpy)(CO) 2 Cl 2 ] in acetonitrile at room temperature.