AbstractThe gas‐phase reaction of methacrolein with the OH radical, in the presence of NOx, was investigated at 298 ± 2 K and atmospheric pressure of air. Hydroxyacetone, methylglyoxal, a peroxyacyl nitrate identified as CH2 C(CH3)C(O)OONO2(peroxymethacryloyl nitrate), formaldehyde, CO, and CO2were observed to be the major products. The product yield data for these compounds show that OH radical addition to the>C C展开▼