1 Introduction</h5> Radical–radical interactions are important in many practical chemical problems. The reaction of the organic peroxy radicals, RO 2 , with NO participates in atmospheric degradation pathways for organic compounds under high level NO x concentration. The peroxy radicals are formed through reactions of alkyl radicals with oxygen. The alkyl radicals can be produced from organic compound emitted to the atmosphere by reactions with OH or NO 3 radicals or by photolysis. The conversion of relatively unreactive RO 2 radicals to highly reactive RO radicals is accompanied by conversion of NO to NO 2 , which after direct sunlight absorption photodissociate to form oxygen atoms enhancing tropospheric ozone formation [1,2] . A second pathway of this reaction leads to the production of nitrates, RONO 2 , which are also produced by the reaction of RO + NO 2 [3–6] . Nitrates are therefore considered as an important sink for RO x radicals in polluted troposphere, particularly in rich NO x region. Chlorine-containing peroxy radical CH 2 ClO 2 appears in the atmosphere as an intermediate in the oxidation of methyl chloride originating from oceans, volcano eruptions and vegetation burning. In contrast to the CH 3 O 2
Chemical Physics Letters – Elsevier
Published: Jul 30, 2013
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