THE REACTION OF HYDROGEN ATOMS WITH SOLID PROPENE AT LOW TEMPERATURES<sup>1</sup>

Klein, Ralph; Scheer, Milton D.; Waller, John G.

doi:10.1021/j100838a030

Cited by 16 publications

(16 citation statements)

References 2 publications

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“…Asterisk denotes old data from II and ref 16b which are corrected here bj'• +18%. 6 Sources of polarizability are (i) Landolt-Bornstein, "Physikalisch-Chemische Tabellen," Vol. I, Part 3, Springer Verlag, Berlin, 1951.…”

Section: Resultsmentioning

confidence: 99%

“…Intermolecular vibrational energy transfer by small molecules at low levels of excitation has been well studied both theoretically2-6 and experimentally. 6 The applicability7•8 of these theories to unimolecular kinetics where high levels of excitation prevail has not been shown to be general. In low-energy transfer, the repulsive part of the interaction is very important, and the shorter the collision duration the greater is the probability of transfer.…”

Section: Introductionmentioning

confidence: 99%

“…(5) F. Tanczos, ibid., 25, 439 (1956). (6) For comprehensive reviews, see (a) T. L. Cottrell and J. C. McCoubrey, "Molecular Energy Transfer in Gases," Butterworths, London, 1961; (b) K. F. Herzfeld and T. A. Litovitz, "Absorption and Dispersion of Ultrasonic Waves," Academic Press, New York, N. Y" 1959. (7) E. E. Nikitin, Proc.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Chan¹,

Rabinovitch²,

Bryant³

et al. 1970

J. Phys. Chem.

138

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Chan¹,

Rabinovitch²,

Bryant³

et al. 1970

J. Phys. Chem.

138

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“…Against this must be set the fact that the present work shows that apparent order may mean little in experiments of this sort. Again, in higher-melting matrices (e.g., 2-methyl pentane) the ratio is concentration dependent,6 a finding which Klein and Scheer themselves explain as due to an enhancement of the rate of reaction (4) relative to ( 2) and (3) because of restricted radical diffusion in the more rigid matrix. Further evidence adduced against the participation of (4) in low melting matrices came from experiments with D atoms,ls 2, 5 particular weight being attached to the finding of C3HsD and C3H4D2 which, it was argued, could only arise via (3) since no HD was found.…”

Section: Mechanism Of Reactionmentioning

confidence: 94%

Reaction of thermally generated hydrogen atoms with propylene films at 77°K

Hughes¹,

Purnell²

1965

Trans. Faraday Soc.

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The reaction of C3H6 f i l m s with thermally generated H atoms at 77°K has been studied by measurement of HZ uptake rates and analysis of the hydrocarbon products. Propane and the three hexanes are the sole products, the ratio C ~H S / Z ' C ~H ~~ being about 11 and 2,3-dimethyl butane predominating in the c 6 fraction. It is shown that hydrogen uptake rates are unreliable as a measure of reaction rate. The reaction is mainly a surface process and the predicted rates of reaction, on the assumption that diffusion of olefin into the surface is the rate-determining step, are compared with experimental data. It is shown that this view is only partially correct and that limited penetration of the film by H atoms occurs. The simple reaction mechanism previously proposed is questionable and reactions of radicals with H and with olefin are important.

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“…4,6,7,9 In this study, the reaction of H with a C 3 H 6 film at 10 K was performed where the diffusion of the molecules in the films is least likely. It was found that only 2-methylpentane was formed as the C6 product and no trace amount of 2,3-dimethylbutane was detected.…”

Section: Introductionmentioning

confidence: 99%

Study on the Tunneling Reaction of H Atoms with a Solid Thin Film of C₃H₆ at 10 K

Hiraoka

Sato

et al. 2002

J. Phys. Chem. B

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The reaction of the solid thin film of propene (C 3 H 6 ) deposited on the silicon substrate at 10 K with cold H atoms (∼27 K) sprayed over the solid films was studied. Propane and 2-methylpentane were found to be the major and minor reaction products, respectively. The rate for the formation of C 3 H 8 increased steeply with a decrease of temperature from 35 to 10 K. This is the general trend for the low-temperature tunneling reactions investigated in our laboratory. With an increase of temperature from 40 to 55 K, the yield of C 3 H 8 showed a slow increase. This may be due to the replenishment of the reactant C 3 H 6 molecules to the surface above ∼40 K (i.e., solid-phase diffusion). The yield of C 3 H 8 from C 3 H 6 was lower than that of C 2 H 6 from C 2 H 4 . This may be due either to the hindrance of the proximity approach of the H atom to the C 3 H 6 double bond by the presence of the methyl group and/or to the annihilation of the H atoms by the H-atom abstraction reaction with the reaction product C 3 H 8 to form the s-C 3 H 7 radical on the surface of the solid film.

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THE REACTION OF HYDROGEN ATOMS WITH SOLID PROPENE AT LOW TEMPERATURES¹

Cited by 16 publications

References 2 publications

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Reaction of thermally generated hydrogen atoms with propylene films at 77°K

Study on the Tunneling Reaction of H Atoms with a Solid Thin Film of C₃H₆ at 10 K

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THE REACTION OF HYDROGEN ATOMS WITH SOLID PROPENE AT LOW TEMPERATURES1

Cited by 16 publications

References 2 publications

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Energy transfer in thermal methyl isocyanide isomerization. Comprehensive investigation

Reaction of thermally generated hydrogen atoms with propylene films at 77°K

Study on the Tunneling Reaction of H Atoms with a Solid Thin Film of C3H6 at 10 K

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THE REACTION OF HYDROGEN ATOMS WITH SOLID PROPENE AT LOW TEMPERATURES¹

Study on the Tunneling Reaction of H Atoms with a Solid Thin Film of C₃H₆ at 10 K