In Situ Study of the Thermal Decomposition of Ethylene Oxide by Infra-Red Spectrometry

Simard, G. L.; Steger, Jožica Čeh; Mariner, Thomas; Salley, D. J.; Williams, Van Zandt

doi:10.1063/1.1747006

Cited by 8 publications

(2 citation statements)

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“…We were not able to discover any propane,l8 formaldehyde (a postulated intermediate 15) nor any acetaldehyde. 18 In a separate experiment it was shown that acetaldehyde did not decompose under our experimental conditions. At 850" there were no products of greater molecular weight than ethylene oxide in the mass range 50 to 100.…”

Section: E X P E R I M E N T a Lmentioning

confidence: 59%

“…All the products listed have been reported previously. [14][15][16][17][18][19] In particular methyl radicals were specifically reported by Rice and Johnston.13 Methylene radicals, first postulated by Fletcher and Rollefson,l~ have never been detected experimentally and we too were unable to find them. Nor were any hydrogen atoms detected, though the large amount of hydrogen gas in the products indicates that these may play some part in the reaction.…”

Section: E X P E R I M E N T a Lmentioning

confidence: 99%

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Free radicals by mass spectrometry. Part II.—The thermal decomposition of ethylene oxide, propyline oxide, dimethyl ether, and dioxane

Lossing¹,

Ingold²,

Tickner³

1953

Discuss. Faraday Soc.

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The thermal decompositions of ethylene oxide, propylene oxide, dimethyl ether and dioxane in a stream of helium have been studied by means of a mass spectrometer designed to permit the measurement of free radical concentrations. With ethylene oxide it was found that each molecule decomposing gave rise to about 0.6 methyl radicals, and in propylene oxide the corresponding number had a lower limit of 0.36. Methyl radicals were also abundant in the decomposition of dimethyl ether. In the decomposition of dioxane only a small number of methyl radicals were found, and they probably come from a secondary reaction. No other radicals were detected, although formaldehyde was found to be a comparatively long-lived intermediate in the decomposition of dimethyl ether. The effect of the addition of nitric oxide on the decomposition of ethylene oxide was examined. Average values for the collision efficiency of the nitric oxide-tmethyl radical reaction at 950", and the methyl radical recombination reaction from 925" to 975" were found to be 2 x 10-4 and 2.5 x 10-2 respectively.

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Section: E X P E R I M E N T a Lmentioning

confidence: 59%