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Crossed-beam dynamics studies of the radical–radical combustion reaction O( 3 P) + CH 3 (methyl)

The dynamics of the radical – radical reaction O( 3 P) + CH 3 , a prototypical case for the reactions of atomic oxygen with alkyl radicals of great relevance in combustion chemistry, has been investigated by means of the crossed molecular beam technique with mass spectrometric detection at a collisi... Full description

Journal Title: Physical Chemistry Chemical Physics 2011, Vol.13(18), pp.8322-8330
Main Author: Balucani, Nadia
Other Authors: Leonori, Francesca , Bergeat, Astrid , Petrucci, Raffaele , Casavecchia, Piergiorgio
Format: Electronic Article Electronic Article
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ID: ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c0cp01623c
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recordid: rscc0cp01623c
title: Crossed-beam dynamics studies of the radical–radical combustion reaction O( 3 P) + CH 3 (methyl)
format: Article
creator:
  • Balucani, Nadia
  • Leonori, Francesca
  • Bergeat, Astrid
  • Petrucci, Raffaele
  • Casavecchia, Piergiorgio
subjects:
  • Chemistry
ispartof: Physical Chemistry Chemical Physics, 2011, Vol.13(18), pp.8322-8330
description: The dynamics of the radical – radical reaction O( 3 P) + CH 3 , a prototypical case for the reactions of atomic oxygen with alkyl radicals of great relevance in combustion chemistry, has been investigated by means of the crossed molecular beam technique with mass spectrometric detection at a collision energy of 55.9 kJ mol −1 . The results have been examined in the light of previous kinetic and theoretical work. From product angular and velocity distribution measurements, the dynamics of the predominant H-displacement channel leading to formaldehyde formation has been characterized. This channel has been found to proceed via the formation of an osculating complex; a significant coupling between the product centre-of-mass angular and translational energy distributions has been noted. Experimental attempts to characterize the dynamics of the channel leading to HCO + H 2 have failed and it remains unclear whether HCO is formed by the reaction and/or, if formed, a part of HCO does not dissociate quickly into CO + H.
language:
source:
identifier: ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c0cp01623c
fulltext: fulltext
issn:
  • 1463-9076
  • 1463-9084
  • 14639084
  • 14639076
url: Link


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titleCrossed-beam dynamics studies of the radical–radical combustion reaction O( 3 P) + CH 3 (methyl)
creatorBalucani, Nadia ; Leonori, Francesca ; Bergeat, Astrid ; Petrucci, Raffaele ; Casavecchia, Piergiorgio
ispartofPhysical Chemistry Chemical Physics, 2011, Vol.13(18), pp.8322-8330
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descriptionThe dynamics of the radical – radical reaction O( 3 P) + CH 3 , a prototypical case for the reactions of atomic oxygen with alkyl radicals of great relevance in combustion chemistry, has been investigated by means of the crossed molecular beam technique with mass spectrometric detection at a collision energy of 55.9 kJ mol −1 . The results have been examined in the light of previous kinetic and theoretical work. From product angular and velocity distribution measurements, the dynamics of the predominant H-displacement channel leading to formaldehyde formation has been characterized. This channel has been found to proceed via the formation of an osculating complex; a significant coupling between the product centre-of-mass angular and translational energy distributions has been noted. Experimental attempts to characterize the dynamics of the channel leading to HCO + H 2 have failed and it remains unclear whether HCO is formed by the reaction and/or, if formed, a part of HCO does not dissociate quickly into CO + H.
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descriptionThe dynamics of the radical – radical reaction O( 3 P) + CH 3 , a prototypical case for the reactions of atomic oxygen with alkyl radicals of great relevance in combustion chemistry, has been investigated by means of the crossed molecular beam technique with mass spectrometric detection at a collision energy of 55.9 kJ mol −1 . The results have been examined in the light of previous kinetic and theoretical work. From product angular and velocity distribution measurements, the dynamics of the predominant H-displacement channel leading to formaldehyde formation has been characterized. This channel has been found to proceed via the formation of an osculating complex; a significant coupling between the product centre-of-mass angular and translational energy distributions has been noted. Experimental attempts to characterize the dynamics of the channel leading to HCO + H 2 have failed and it remains unclear whether HCO is formed by the reaction and/or, if formed, a part of HCO does not dissociate quickly into CO + H.
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abstractThe dynamics of the radical – radical reaction O( 3 P) + CH 3 , a prototypical case for the reactions of atomic oxygen with alkyl radicals of great relevance in combustion chemistry, has been investigated by means of the crossed molecular beam technique with mass spectrometric detection at a collision energy of 55.9 kJ mol −1 . The results have been examined in the light of previous kinetic and theoretical work. From product angular and velocity distribution measurements, the dynamics of the predominant H-displacement channel leading to formaldehyde formation has been characterized. This channel has been found to proceed via the formation of an osculating complex; a significant coupling between the product centre-of-mass angular and translational energy distributions has been noted. Experimental attempts to characterize the dynamics of the channel leading to HCO + H 2 have failed and it remains unclear whether HCO is formed by the reaction and/or, if formed, a part of HCO does not dissociate quickly into CO + H.
doi10.1039/c0cp01623c
pages8322-8330
date2011-04-21