Reactions of oxygen atoms with hydrogen cyanide, cyanogen chloride and cyanogen bromide

Abstract

The reactions of oxygen atoms with hydrogen cyanide, with cyanogen chloride and with cyanogen bromide, have been studied in a discharge flow system at temperatures between 450 and 650°K. The mechanisms are O + XCN = NCO + X, O + NCO = NO + CO, The following Arrhenius expressions were obtained for the initial steps. O + HCN, k= 5.2 × 1012 exp (–8,100 ± 1,200/RT) cm3 mole–1 sec–1, O + ClCN, k= 1.5 × 1012 exp (–6,900 ± 700/RT) cm3 mole–1 sec–1, O + BrCN, k= 1.4 × 1013 exp (–9,700 ± 1,200/RT) cm3 mole–1 sec–1.