Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.

Issue 13, 2002
Previous Article Next Article

Reaction of OH + NO2 + M: Kinetic evidence of isomer formation

Author affiliations


The objective of this paper is twofold: First, we present new experimental data on the reaction of OH + NO2 at room temperature, which show that the results obtained earlier in our laboratory (see []) are about 30% too high. Secondly, we provide direct experimental evidence, that peroxynitrous acid (HOONO) is formed in the title reaction: At temperatures between 430 and 480 K we observe bi-exponential OH loss over the complete pressure range (1–130 bar) studied, which certainly supports the formation of the HOONO isomer. We determined the equilibrium constant for the OH + NO2 ⇔ HOONO reaction as a function of temperature and extracted from a 3rd-law analysis an O–O bond energy in the HOONO of ΔH°(0 K) = 83 ± 1 kJ mol−1.

Back to tab navigation

Article information

22 Feb 2002
28 Mar 2002
First published
21 May 2002

Phys. Chem. Chem. Phys., 2002,4, 2959-2964
Article type

Reaction of OH + NO2 + M: Kinetic evidence of isomer formation

H. Hippler, S. Nasterlack and F. Striebel, Phys. Chem. Chem. Phys., 2002, 4, 2959
DOI: 10.1039/B201932A

Social activity

Search articles by author