Gas-phase reactions of azulene with OH and NO3 radicals and O3 at 298 ± 2 K

✍ Scribed by Roger Atkinson; Janet Arey; Sara M. Aschmann

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 830 KB
• Volume: 24
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.550240507

✦ Synopsis

Abstract

Azulene, which is isomeric with naphthalene, was studied to determine whether it behaves like a polycyclic aromatic hydrocarbon or an alkene in its gas‐phase reactions with OH and NO~3~ radicals and O~3~. Using relative rate methods, rate constants for the reactions of azulene with OH and NO~3~ radicals and O~3~ of (2.73 ± 0.56) × 10^−10^ cm^3^ molecule^−1^ s^−1^, (3.9) × 10^−10^ cm^3^ molecule^−1^ s^−1^, and <7 × 10^−17^ cm^3^ molecule^−1^ s^−1^, respectively, were obtained at 298 ± 2 K. The observation that the NO~3~ radical reaction did not involve NO~2~ in the rate determining step indicates that azulene behaves more like an alkene than a polycyclic aromatic hydrocarbon in this reaction. No conclusive evidence for the formation of nitroazulene(s) from either the OH or NO~3~ radical‐initiated reaction of azulene (in the presence of NO~x~) was obtained.