2-Methylbut-2-Ene

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George Marston - One of the best experts on this subject based on the ideXlab platform.

  • the effect of criegee intermediate scavengers on the oh yield from the reaction of ozone with 2 methylbut 2 ene
    Journal of Physical Chemistry A, 2001
    Co-Authors: David Johnson, And Alison G Lewin, George Marston
    Abstract:

    The yield of OH from the gas-phase reaction of ozone with 2-Methylbut-2-Ene has been measured in the presence of various molecules (H2O, SO2, butanone, and acetic acid) that can act as scavengers for the Criegee intermediates (CIs) formed in the reaction. No discernible difference is observed between experiments carried out in the presence and absence of these scavengers. The results indicate that the thermal decomposition of CIs that give OH radicals is fast compared with their bimolecular reaction with the scavengers under the conditions of the experiments. Combined with the results of a recent time-resolved study, upper limits (in units of cm3 molecule-1 s-1) were determined for the bimolecular reactions of the CI with H2O (1 × 10-16), SO2 (4 × 10-15), butanone (2 × 10-14), and acetic acid (1 × 10-14). The results imply that these reactions are too slow to inhibit OH formation in the ozonolysis of alkenes and that the currently recommended OH yields can be used in models of atmospheric chemistry.

  • Product yields in the reactions of ozone with Z-but-2-ene, E-but-2-ene and 2-Methylbut-2-Ene
    Chemosphere, 1999
    Co-Authors: C.d. Mcgill, Andrew R. Rickard, David Johnson, George Marston
    Abstract:

    Abstract Preliminary results on some aspects of the mechanisms of the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene are presented. Primary carbonyl product yields were measured under ‘OH-free’ conditions and OH yields were determined by monitoring the disappearance of 1,3,5-trimethylbenzene. Ethanal yields relative to alkene consumed were measured as 0.86±0.03, 0.85±0.07 and 0.66±0.02 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively. For 2-Methylbut-2-Ene, the propanone yield was 0.35±0.03. Hydroxyl radical yields relative to alkene consumed were measured as 0.33±0.07, 0.54±0.11 and 0.81±0.16 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively.

  • Hydroxyl‐radical formation in the gas‐phase ozonolysis of 2‐methylbut‐2‐ene
    Geophysical Research Letters, 1998
    Co-Authors: George Marston, C.d. Mcgill, Andrew R. Rickard
    Abstract:

    Relative rate constants have been measured for the reactions of eight pairs of organic compounds with the reactive species formed in the reaction of ozone with 2-Methylbut-2-Ene. A total of eight compounds were studied, including three alkanes, two alkenes, two conjugated alkenes and one aromatic hydrocarbon. With the exception of one pair of compounds (cyclohexane/2-methylpropane), the relative rate constants obtained are consistent with the assumption that the reactive intermediate is the hydroxyl radical, OH. The origin of the anomalous result for the cyclohexane/2-methylpropane pair is not clear.

C.d. Mcgill - One of the best experts on this subject based on the ideXlab platform.

  • Product yields in the reactions of ozone with Z-but-2-ene, E-but-2-ene and 2-Methylbut-2-Ene
    Chemosphere, 1999
    Co-Authors: C.d. Mcgill, Andrew R. Rickard, David Johnson, George Marston
    Abstract:

    Abstract Preliminary results on some aspects of the mechanisms of the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene are presented. Primary carbonyl product yields were measured under ‘OH-free’ conditions and OH yields were determined by monitoring the disappearance of 1,3,5-trimethylbenzene. Ethanal yields relative to alkene consumed were measured as 0.86±0.03, 0.85±0.07 and 0.66±0.02 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively. For 2-Methylbut-2-Ene, the propanone yield was 0.35±0.03. Hydroxyl radical yields relative to alkene consumed were measured as 0.33±0.07, 0.54±0.11 and 0.81±0.16 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively.

  • Hydroxyl‐radical formation in the gas‐phase ozonolysis of 2‐methylbut‐2‐ene
    Geophysical Research Letters, 1998
    Co-Authors: George Marston, C.d. Mcgill, Andrew R. Rickard
    Abstract:

    Relative rate constants have been measured for the reactions of eight pairs of organic compounds with the reactive species formed in the reaction of ozone with 2-Methylbut-2-Ene. A total of eight compounds were studied, including three alkanes, two alkenes, two conjugated alkenes and one aromatic hydrocarbon. With the exception of one pair of compounds (cyclohexane/2-methylpropane), the relative rate constants obtained are consistent with the assumption that the reactive intermediate is the hydroxyl radical, OH. The origin of the anomalous result for the cyclohexane/2-methylpropane pair is not clear.

José-luis Giner - One of the best experts on this subject based on the ideXlab platform.

Andrew R. Rickard - One of the best experts on this subject based on the ideXlab platform.

  • Product yields in the reactions of ozone with Z-but-2-ene, E-but-2-ene and 2-Methylbut-2-Ene
    Chemosphere, 1999
    Co-Authors: C.d. Mcgill, Andrew R. Rickard, David Johnson, George Marston
    Abstract:

    Abstract Preliminary results on some aspects of the mechanisms of the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene are presented. Primary carbonyl product yields were measured under ‘OH-free’ conditions and OH yields were determined by monitoring the disappearance of 1,3,5-trimethylbenzene. Ethanal yields relative to alkene consumed were measured as 0.86±0.03, 0.85±0.07 and 0.66±0.02 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively. For 2-Methylbut-2-Ene, the propanone yield was 0.35±0.03. Hydroxyl radical yields relative to alkene consumed were measured as 0.33±0.07, 0.54±0.11 and 0.81±0.16 for the reactions of ozone with Z -but-2-ene, E -but-2-ene and 2-Methylbut-2-Ene, respectively.

  • Hydroxyl‐radical formation in the gas‐phase ozonolysis of 2‐methylbut‐2‐ene
    Geophysical Research Letters, 1998
    Co-Authors: George Marston, C.d. Mcgill, Andrew R. Rickard
    Abstract:

    Relative rate constants have been measured for the reactions of eight pairs of organic compounds with the reactive species formed in the reaction of ozone with 2-Methylbut-2-Ene. A total of eight compounds were studied, including three alkanes, two alkenes, two conjugated alkenes and one aromatic hydrocarbon. With the exception of one pair of compounds (cyclohexane/2-methylpropane), the relative rate constants obtained are consistent with the assumption that the reactive intermediate is the hydroxyl radical, OH. The origin of the anomalous result for the cyclohexane/2-methylpropane pair is not clear.

Duilio Arigoni - One of the best experts on this subject based on the ideXlab platform.