The reactions of the Criegee intermediate CH3 CHOO in the gas-phase ozonolysis of 2-butene isomers

✍ Scribed by Osamu Horie; Peter Neeb; Geert K. Moortgat

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 134 KB
• Volume: 29
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/(sici)1097-4601(1997)29:6<461::aid-kin8>3.0.co;2-s

✦ Synopsis

Ozonolysis of cis-and trans-2-butene isomers were carried out in a 570 l spherical glass vessel in 730 torr synthetic air at 295 Ϯ 3 K. The initial concentrations were 5 to 10 ppmv for the isomers and 2 to 5 ppmv for ozone. Quantitative yields were determined by FTIR spectroscopy for CH 3 CHO, HCHO, CH 4 , CH 3 OH, CO, and CO 2 . By means of computational subtraction of the spectral contribution of the identified products from the product spectra, residual spectra have been obtained. Formation of 2-butene ozonide, propene ozonide, and 1-hydroperoxyethyl formate CH 3 CH(OOH) -O -CH(O) have been identified in the residual spectra. These products have been shown to be formed in the reactions of the Criegee intermediate CH 3 CHOO with CH 3 CHO, HCHO, and HCOOH, respectively. Mechanistic implications and atmospheric relevance of these observations are discussed.