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- W1966575384 abstract "La photolyse du chloro-1-propane a été étudiée à 184,9, vers 163,3 et à 147 nm en présence ou absence d'intercepteur radicalaire. A 184,9 nm, on a montré que la réaction principale de fragmentation de la molécule photoexcitée (Φ ⩾ 0,5) correspond à la rupture de la liaison CCl. Le radical n-propyle n'emporte qu'une faible part de l'excédent de l'énergie du photon sous forme vibrationnelle de telle sorte qu'il ne se fragmente pas ou très peu. L'effet du temps d'irradiation, ou mieux du taux de conversion, a montré la présence de chlorure d'hydrogène bien que celui n'ait pas été analysé. L'ajout de 5% d'ammoniac élimine les réactions secondaires associées à ce produit. A 147 nm l'éthylène est le produit majeur. Il semble cependant que celui-ci ne provienne pas complètement de la fragmentation d'un radical n-propyle. Il serait surtout formé directement dans la fragmentation primaire de la molécule photoexcitée, fragmentation qui formerait aussi des radicaux méthylènes. The photolysis of 1-chloropropane was studied at 184.9, 163.3 and 147 nm in the presence or the absence of a radical scavenger. The main fragmentation process observed at 184.9 nm involves the rupture of the CCl bond (Φ ⩾ 0.5). The n-propyl fragment has a low internal energy content compared with the excess energy of the incident photon so it does not itself fragment (or does so with a low probability). The effect of the irradiation time (or conversion effect) showed the presence of hydrogen chloride although this product was not analysed. The addition of 5% ammonia eliminated this effect. At 147 nm, the main product is ethylene. However, this product does not seem to be the result of the secondary decomposition of the excited n-propyl radical. It could be formed in a primary fragmentation process of the photoexcited molecule leading also to the formation of the methylene radical." @default.
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- W1966575384 date "1983-01-01" @default.
- W1966575384 modified "2023-09-24" @default.
- W1966575384 title "Photolyse du chloro-1-propane entre 184,9 et 147 nm" @default.
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- W1966575384 doi "https://doi.org/10.1016/0047-2670(83)80053-7" @default.
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