INVESTIGATION OF THE REACTIONS OF BENZONITRILE, ETHYLBENZENE AND CUMENE WITH O(3P) IN THE GAS-PHASE

The rates of the reactions of benzonitrile, ethylbenzene and cumene with atomic oxygen in the ground state [O(3P)] have been measured in a discharge flow system with mass spectrometric detection. All measurements were performed in an excess of O-atoms in the temperature range 298 K - 873 K. The following Arrhenius expressions for the bimolecular rate constants were obtained: Benzonitrile: k(T) = (1.5 +/- 0.4) . 10(13) . exp(-2694 +/- 269 divided-by T)cm3 . mol-1 . s-1 Ethylbenzene: k(T) = (2.2 +/- 0.4) . 10(13) . exp(-1912 +/- 191 divided-by T)cm3 . mol-1 . s-1 Cumene: k(T) = (2.0 +/- 0.3) . 10(13) . exp(-1839 +/- 184 divided-by T)cm3 . mol-1 . s-1.