Photoinduced insertion of tungsten into aromatic and aliphatic carbon–hydrogen bonds by bis(η-cyclopentadienyl)tungsten derivatives
| Autor: | Malcolm L. H. Green, Keith Elmitt, Madeleine Berry |
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| Rok vydání: | 1979 |
| Předmět: | |
| Zdroj: | J. Chem. Soc., Dalton Trans.. :1950-1958 |
| ISSN: | 1364-5447 0300-9246 |
| Popis: | Photolysis of solutions of [W(η-C5H5)2H2] in fluorobenzene, o-xylene, anisole, p-chlorotoluene, p-xylene, mesitylene, p-methylanisole, and methyl benzoate gives the compounds [W(η-C5H5)2H(C6H4F-3 and -4)], [W(η-C5H5)2H(C6H3Me2-3,4)], [W(η-C5H5)2H(C6H4OMe-4)], [W(η-C5H5)2Cl(C6H4Me-4)], [W(η-C5H5)2(CH2C6H4Me-4)2], [W(η-C5H5)2(CH2C6H3Me2-3,5)2], [W(η-C5H5)2(CH2C6H4OMe-4)2], and [W(η-C5H5)2H(C6H4CO2Me-3 and -4)] together with [W(η-C5H5)2H(OCOPh)], respectively. Thermal decomposition of [W(η-C5H5)2H(Me)] in mesitylene gives [W(η-C5H5)2H(CH2C6H3Me2-3,5)]. Photolysis of this compound in p-xylene gives [W(η-C5H5)2(CH2C6H4Me-4)(CH2C6H3Me2-3,5)]. Photolysis of [W(η-C5H5)2H2] in tetra-methylsilane gives cis- and trans-[H(η-C5H5)W(σ: η5-C5H4)2W(η-C5H5)(CH2SiMe3)]. The photoinduced reaction between [W(η-C5H5)2H2] and toluene, a toluene–mesitylene mixture, and methyl propionate are also described. The mechanisms of these photoinduced insertions of tungsten into aromatic and aliphatic C–H bonds are discussed. |
| Databáze: | OpenAIRE |
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