Allowed energetic pathways for the three-body recombination reaction of nitrogen monoxide with the hydroxyl radical and their potential atmospheric implications
The OH initiated oxidation of nitric oxide (NO) is an important atmospheric reaction being, during the day time, the main channel that leads to the formation of HONO a reservoir species for both OH and odd nitrogen. This work reports ab initio study of the Potential Energy Surface (PES) of NO + OH u...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Brasil |
| Institución: | Universidade Federal de Mato Grosso do Sul (UFMS) |
| Repositorio: | Repositório Institucional da UFMS |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufms.br:123456789/5323 |
| Acceso en línea: | https://repositorio.ufms.br/handle/123456789/5323 |
| Access Level: | acceso abierto |
| Palabra clave: | CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA Hidróxidos Compostos Inorgânicos Compostos de Nitrogênio Radical Hidroxila Óxido Nítrico Hydroxides Inorganic Chemicals Nitrogen Compounds Hydroxyl Radical Nitric Oxide |
| Sumario: | The OH initiated oxidation of nitric oxide (NO) is an important atmospheric reaction being, during the day time, the main channel that leads to the formation of HONO a reservoir species for both OH and odd nitrogen. This work reports ab initio study of the Potential Energy Surface (PES) of NO + OH using density functional theory calculations conducted at the B3LYP level of theory with a 6-311g (d,p) basis set. We confirmed experimental observations pointing out that the main channel for this reaction is the formation the HONO. From the addition of OH to NO both cis and trans isomers of HONO were found to be the formed as stable intermediate, both having a negative enthalpy of formation relative to the reactants, the cis isomer being more stable than the trans one. The ab initio calculations were extended to include the hydrogen extraction mechanism with its respective transition state to investigate the potential existence of a reaction channel leading to the formation of NO2 + H, that was found not to be of significant interest. |
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