OH radical-initiated reaction of 3-hexene-2,5-dione: formation of methylglyoxal.
Environ Sci Technol
; 37(15): 3339-41, 2003 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-12966979
ABSTRACT
3-Hexene-2,5-dione [CH3C(O)CH=CHC(O)CH3] and other unsaturated 1,4-dicarbonyls are formed from the atmospheric photooxidations of aromatic hydrocarbons. We have reinvestigated the formation of methylglyoxal from the gas-phase reaction of OH radicals with 3-hexene-2,5-dione in the presence of NO at room temperature and atmospheric pressure of air using in situ Fourier transform infrared spectroscopy. No evidence for the formation of methylglyoxal was obtained, with the IR spectra showing that methylglyoxal is, at most, a minor reaction product with a molar formation yield of <10% (and more likely <1%). This confirms our earlier study (Tuazon et al. Environ. Sci. Technol. 1985, 19, 265) and suggests that the CH3C(O)CH(OH)CHO and CH3C(O)CH(OH)CH(ONO2)C(O)CH3 observed by Bethel et al. (Environ. Sci. Technol. 2001, 35, 4477) are the major first-generation reaction products.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aldeído Pirúvico
/
Oxidantes
/
Radical Hidroxila
/
Poluentes Atmosféricos
/
Alcenos
Idioma:
En
Revista:
Environ Sci Technol
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Estados Unidos