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- W2060833384 abstract "A systematic study of the pressure effects on the quantum yields of some products between 0.1 and 600 Torr (13 and 80 000 N m −2 ) was carried out in the 7.6 and 8.4 eV photolysis of normal, iso- and cis-2-butenes. The propylene quantum yield (s-C 4 H 9 * → C 3 H 6 + CH 3 ) decreased with the increase in the n-butene pressure and a good linearity of S/D (stabilization/decomposition) vs. pressure plot, over a broad pressure region, was observed. It is concluded that hydrogen atoms involved in the s-C 4 H 9 * radical formation are produced with a relatively narrow energy distribution. The slope of S/D vs. pressure lines decreased with the increase in photon energy, indicating the trend in the kinetic energy of the H-atoms.In the case of isobutene and cis-2-butene photolysis, the Stern–Volmer plots for allene formation were nonlinear. It is concluded that the formation of two different allene precursors is needed to account for this result. By the use of a simple RRK-type formalism we also conclude that the excess energy of the photon in the primary photoexcited butene molecules is far from being randomized before their fragmentation occurs.[Formula: see text]" @default.
- W2060833384 created "2016-06-24" @default.
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- W2060833384 date "1978-10-15" @default.
- W2060833384 modified "2023-10-18" @default.
- W2060833384 title "Excited radicals in the gas phase photolysis of butene isomers at different photon energies: energy distribution in reaction products" @default.
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- W2060833384 doi "https://doi.org/10.1139/v78-433" @default.
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