- The gas-phase reaction of the CF3 radical with thiophene
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The reaction of CF3 radicals, generated by photolysis of CF 3I or hexafluoroacetone with thiophene, was studied in the gas phase at 25°C. At conversion of thiophene less than 20%, monosubstituted CF 3-thiophenes were found as the main reaction products, in addition to CF3H, C2F6, and monosubstituted dihydro-CF3-thiophene, the latter in very low proportion. An isomeric mixture of 2- and 3-CF3-thiophene was obtained in a ratio of about 16, independent of the radical source used (CF3I or hexafluoroacetone) to produce the CF3 radicals. A plausible mechanism that accounts for the observed products is proposed, and the reactivity of thiophene toward the CF3 radical at 25°C was determined as kadd/kc1/2 = 106 ± 4 cm3/2 mol-1/2 s-1/2.
- Herrera, Olga S.,Nieto, Jorge D.,Lane, Silvia I.,Oexler, Elena V.
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p. 1477 - 1481
(2007/10/03)
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- TRIFLUORMETHYLIERUNGSREAKTIONEN VON CF3I, Te(CF3)2, Sb(CF3)3, Hg(CF3)2, UND Cd(CF3)2*D MIT FURAN, THIOPHEN, PYRROL UND p-BENZOCHINON
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The trifluoromethylation reactions of Cd(CF3)2*glyme, Hg(CF3)2, Sb(CF3)3, CF3I, and Te(CF3)2 with furan, thiophene, pyrrol, and p-benzoquinone are compared under similar conditions.During the photochemical reactions the reactivity increases in the series
- Naumann, Dieter,Kischkewitz, Juergen
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p. 265 - 281
(2007/10/02)
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