Rate constants for the reactions of NO3 with a number of aliphatic mono-and dialkenes and monoterpenes have been determined in a 420 1 reaction chamber at I-bar total pressure of synthetic air by 298 K with a relative kinetic method. The products of these reactions have been investigated also at I-bar total pressure of synthetic air with in situ FT-IR spectrometry and gas chromatography. In all cases, the initial formation of thermally unstable nitrooxy- ...