Heterogeneous reaction of nitric acid with methyl sulfide
The reaction of gaseous mixtures of CH3SCH3 and HNO3, studied by infrared spectroscopy and gas chromatography, was found to occur heterogeneously. The products detected were NO2 and CH3S(O)CH3, and approximately one NO2 was formed for each CH3SCH3 consumed. The initial rate of formation of NO2 was first order in CH3SCH3 and zero order in HNO3. The mechanism is discussed, and an upper limit is determined for the rate constant of the homogeneous reaction.