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The reaction of acetylperoxy radicals with NO2

โœ Scribed by Norman Basco; Sucha S. Parmar

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
593 KB
Volume
19
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

Acetylperoxy radicals were produced by the flash photolysis of chlorine in the presence of acetaldehyde and oxygen. By adding various concentrations of nitrogen dioxide, the rate constant for the reaction producing PAN

was measured to be k, (153 Torr) = (2.29 ? 0.051 X The effect of pressure has been studied over the range 76-612 Torr and the data fitted to a fall-off curve with k ; = 1.85 x 10'" L'/mol' a. and k ; = 3.67 x 10" Ljmol s. h-ith a calculated value of the dissociation constant, k"., = 268 Limo1 s and of the equilibrium constant, K , = 1.04 x lo'? Ljmol, t h e expected strong collision value for h i is 2.79 x 10'' L2/molL s.

The ultraviolet absorption spectrum of PAN has been characterized in the range 205-260 nm. L/mol s.

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## Abstract The rate constants for the reactions magnified image have been measured directly by flash photolysis and kinetic spectroscopy. At room temperature, __k__~3~ = (3.4 ยฑ 0.1) ร— 10^9^ L/molยทs, independent of pressure in the range of 55โ€“400 torr, and __k__~6~ = (2.1 ยฑ 0.2) ร— 10^9^ L/molยทs.