51936-05-1Relevant academic research and scientific papers
Kinetics of oxirane formation in the reaction of nitrate radicals with tetramethylethylene
Berndt,Boge
, p. 869 - 871 (1994)
The kinetics of oxirane formation in the reaction of nitrate radicals with tetramethylethylene was investigated in a flow system at room temperature. Total pressure ranged from 5 to 1000 mbar. Using inert gas (He, N2) tetramethyloxirane only was detected as reaction product. In the case of synthetic air acetone also is formed in dependence of the system pressure. With increasing pressure the oxirane yield decreases and the acetone yield increases. Under tropospheric conditions 20% tetramethyloxirane was found. It is concluded that the oxirane observed results from the excited adduct formed in the electrophilic addition of the nitrate radical to the double bond. In the absence of O2 the quenched adduct radical formes oxirane in a thermal reaction also.
Products and Mechanisms of the Gas-Phase reactions between NO3 and a Series of Alkenes
Hjorth, J.,Lohse, C.,Nielsen, C. J.,Skov, H.,Restelli, G.
, p. 7494 - 7500 (2007/10/02)
Products and mechanisms for the gas-phase reactions of NO3 radicals with a series of alkenes in air have been studied.The experiments with propene, isobutene, trans- and cis-2-butene, 2-methyl-2-butene, and 2,3-dimethyl-2-butene were carried out at 295 +/- 2 K and 740 +/- 5 Torr in a 480-L Teflon-coated reaction chamber where NO3 was generated by the thermal dissociation of N2O5.Reactants and products were observed to produce nitroxy-nitroperoxy intermediates that decayed with formation of carbonyl, nitroxycarbonyl, nitroxy alcohol, and dinitrate species.The product distribution was found to be dependent on the alkyl substitution pattern around the double bond.Evidence was also found of a reaction between NO3 and organic peroxy radicals with a rate constant measured in the case of 2,3-dimethyl-2-nitroxy-3-peroxybutane radical to be of the order of 5 * 10-12 cm3 molecule-1 s-1.
