Kinetics of the Reaction of OH Radicals with CH 2 CO

The kinetics of the homogeneous gas phase reaction OH + CH 2 CO → products (1) has been investigated at room temperature and pressures between 1.4 mbar ≤ p ≤ 2.5 mbar using the discharge flow method. Reactors with Teflon wall coatings and with different surface‐to‐volume ratios were employed to exclude effects of heterogeneous reactions. OH radicals were generated via the reaction F + H 2 O. Their concentration‐versus‐time decay profiles were followed under pseudo‐first‐order conditions, [CH 2 CO] → [OH] 0 with a Far Infrared Laser Magnetic Resonance (FIR‐LMR) spectrometer. The rate constant of the title reaction was found to be k 1 , (296 K) = (7.2 ± 2.0)·10 12 cm 3 /mol·s.