Volume 86 Issue 34 | p. 31 | Concentrates
Issue Date: August 25, 2008

Predicted Acid Rain Intermediate Observed

Department: Science & Technology
News Channels: JACS In C&EN

An intermediate molecule predicted to form in the atmosphere during the reaction of a hydroxyl radical with nitric acid (HONO2) has been observed spectroscopically for the first time (Proc. Natl. Acad. Sci. USA, DOI: 10.1073/pnas.0800320105). The reaction plays a key role in controlling the atmospheric concentration of nitrogen oxides, which influences the formation of acid rain. Structural details of the OH–HONO2 intermediate, which has a unique six-membered ringlike configuration formed by two different hydrogen bonds, . . .

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