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 be
Spectra and reactions of acetyl and acetylperoxy radicals
β Scribed by Norman Basco; Sucha S. Parmar
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 451 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
The ultraviolet absorption spectra of the acetyl and acetylperoxy radicals have been Characterized in the range 195-280 nm. The acetyl radical was generated by the flash phbtolysis of Clz in the presence of CH3CH0 and was converted to the acetylperoxy radical in the presence of excess O2 The extinction coefficient of the acetylperoxy radical was measured to be 2300 L/mol cm at the maximum at 207 nm and the rate constant for the reaction 2CHSC03 -2CH3 + 2C02 + 0 2 was evaluated to be k, = (4.8 2 0.8) x lo9 L/mol s
π SIMILAR VOLUMES
The kinetics of H abstraction by methyl and acetyl radicals from poly(vinyl acetophenone) (PVAP) tilms (4 x 10 ~ mm thick) have been investigated, both radicals being derived from the polymer by photolysis (2 > 300 nm) under high vacuum conditions (pressure < 10 a Pa). Differential equations have be
The flash photolysis of biacetyl produces CO, CZH6, and CH3COCH3 as main products, and in small amounts COz, CzH4, and CH3CHO. The rate constants of reactions ( 2) and of' thermally equilibrated radicals were calculated from the amounts of products: ) lo'\* dm3/mol. s k 3 = (2.43 f 0.14) 1O1O dm3/