THE DETERMINATION OF RATE CONSTANTS FOR THE REACTIONS OF SOME ALKENES WITH THE NO3 RADICAL

Abstract

AbstractThe kinetics of the reaction of NO3 radicals with five alkenes was investigated at room temperature in a discharge fast flow system with mass spectrometric detection. NO3 radicals were produced by hydrogen abstraction from HNO3 with F atoms. The 1:1 stoichiometry of the reactions was confirmed. Rate constants were determined by measuring the decay of NO3 and/or of alkene under pseudo‐first‐order conditions. The following values of rate constants are reported: trans‐2‐butene (3.9 ± 0.3)·10−13, cis‐2‐butene (3.8±0.2)·10−13, iso‐butene (3.9±0.4)·10−13, 2‐methyl‐2‐butene (8.4±0.6)·10−12, 2,3‐dimethyl‐2‐butene (4.1±0.4)·10−11 in units of cm3 molecule−1 s−1. The results are compared with l..