Isomerization and Decay of a Criegee Intermediate CH3CHOO in the Earth’s Upper Atmosphere

Autor: M. G. Golubkov, I. D. Rodionov, P. K. Wang, A. I. Rodionov, Yu. A. Dyakov, V. L. Shapovalov, Gennady V. Golubkov, I. P. Rodionova, V. D. Peskov, O. A. Olkhov, D. V. Shestakov, S. O. Adamson
Rok vydání: 2021
Předmět:
Zdroj: Russian Journal of Physical Chemistry B. 15:559-565
ISSN: 1990-7923
1990-7931
Popis: Criegee intermediates, or carbonyl oxides, are formed during the ozonolysis of alkenes, which are typical anthropogenic air pollutants. They play an important role in a variety of chemical reactions occurring both in the near-surface layer and in the upper layers of the Earth’s atmosphere. In the lower troposphere, Criegee intermediates have time to lose their internal vibrational energy due to collisions with nitrogen molecules and interact with other components of the atmosphere in their original form. The products of such reactions are, for example, sulfuric and nitric acids. In the stratosphere and mesosphere, Criegee intermediates decompose into chemically active fragments that participate in a variety of secondary reactions. In this study, we consider the processes of decomposition of the methylcarbonyloxide isomer anti-CH3CHOO in the upper atmosphere. It is shown that the main decay products are atomic oxygen, methane, CO, CO2, and OH radicals. The formation of more complex chemically active fragments is also possible.
Databáze: OpenAIRE
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