Solution and matrix photochemistry of the isoelectronic series of a ‘half -sandwich’ carbonyl(η5-cyclopentadienyl)nitrosyl complexes of manganese, chromium, and vanadium, [M(η5-C5H5)(CO)3 –n(NO)n](n= 0, M = Mn; n= 1, M = Cr; n= 2, M = V)
| Autor: | Herbert Trampisch, Ramli B. Hitam, Max Herberhold, Antony J. Rest, Walter Kremnitz, David J. Taylor |
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| Rok vydání: | 1982 |
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| Zdroj: | J. Chem. Soc., Dalton Trans.. :1261-1273 |
| ISSN: | 1364-5447 0300-9246 |
| DOI: | 10.1039/dt9820001261 |
| Popis: | Photolysis of the isoelectronic η5-cyclopentadienyl (cp) half-sandwich compounds [Mn(cp)(CO)3](1), [Cr(cp)(CO)2(NO)](2), and [V(cp)(CO)(NO)2](3) in either low-temperature matrices (CH4, Ar, CO, N2) or ambient-temperature solutions [hexane, tetrahydrofuran (thf), cyclo-octene] generally results in elimination of a CO ligand as the primary photoreaction. The photo-generated complexes were characterised by their i.r. absorptions [ν(CO), ν(NO)] and by their secondary reactions in ‘reactive’ matrices (13CO, N2) or co-ordinating solvents (thf, cyclo-octene), respectively. Matrix-isolated [V(cp)(CO)(NO)2](3) is transformed by visible light into a species [V(cp)(CO)(NO)(NO*)] where NO* is considered as a one-electron ligand. The photo-induced reactions of (1)–(3) with triethylphosphine were also investigated. In contrast to (1) and (2), [V(cp)(CO)(NO)2](3) undergoes substitution of the CO ligand in the dark at room temperature. |
| Databáze: | OpenAIRE |
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