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A molecular mechanism for the heterogeneous reaction of N2O5 has remained elusive but is generally thought to proceed through hydrolysis forming nitrate in the condensed phase. The heterogeneous reaction of N2O5 at aqueous interfaces can serve as a chain terminating reaction in the catalytic cycling of NOx radicals that generate ozone in the lower atmosphere. Dinitrogen pentoxide (N2O5) is a naturally occurring gas-phase nitrating agent that acts as a nocturnal NOx reservoir (NOx ≡ NO + NO2) in the atmosphere.
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