Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 22
Articles | Volume 25, issue 22
https://doi.org/10.5194/acp-25-16713-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-16713-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 22
Research article
 | 
25 Nov 2025
Research article |  | 25 Nov 2025

Criegee + HONO reaction: a bimolecular sink of Criegee, and the missing non-photolytic source of OH•

Vishva Jeet Anand, Philips Kumar Rai, and Pradeep Kumar

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Short summary
We have studied the energetics and kinetics of the bimolecular reaction of simple and dimethyl-substituted Criegee intermediates with HONO computationally. The investigation suggests that HONO can be an important sink for Criegee intermediates and a potential source of OH radicals. Our study also reveals that this reaction is also capable of recycling OH • ↔ HO•2 , and hence, can be key in resolving the discrepancy between observed and modeled concentrations of OH and HO2 radicals.
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