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

被引：54

作者：

Hippler, H ^{[1
]}

Nasterlack, S ^{[1
]}

Striebel, F ^{[1
]}

机构：

[1] Univ Karlsruhe, Lehrstuhl Mol Phys Chem, D-76128 Karlsruhe, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 13期

关键词：

D O I：

10.1039/b201932a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 [ref. 1 and 2]) 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 DeltaDdegrees (0 K) = 83 +/- 1 kJ mol(-1).

引用

页码：2959 / 2964

页数：6

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