# IR CAVITY RINGDOWN STUDY OF HOONO FORMATION FROM $OH + NO_{2}$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/20724

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 Title: IR CAVITY RINGDOWN STUDY OF HOONO FORMATION FROM $OH + NO_{2}$ Creators: Nizkorodov, Sergey A.; Bean, Brian D.; Mollner, Andrew K.; Okumura, Mitchio; Sander, S. P. Issue Date: 2002 Publisher: Ohio State University Abstract: The reaction of $OH + NO_{2} \rightarrow HNO_{3}$ is a critical sink of $HO_{x}$ and $NO_{x}$ radicals in the atmosphere. The unstable intermediate HOONO has long been proposed as a minor channel. Because HOONO is predicted to be bound by $<20$ kcal/mol, it would thermally decompose to reactants and would not serve as a sink for OH radicals; hence, its formation would reduce the rate of stable nitric acid formation. We report direct detection of this adduct at $3280cm^{-1}$ by IR cavity ring-down spectroscopy in a discharge flow cell, and present a study of its relative yield and significance in the troposphere and stratosphere. Description: Author Institution: Chemistry Dept., California Institute of Technology; Jet Propulsion Laboratory, California Institute of Technology URI: http://hdl.handle.net/1811/20724 Other Identifiers: 2002-WJ-07