A flash photolysis investigation of the gas phase uv absorption spectrum and self‐reaction kinetics of the neopentylperoxy radical

The ultraviolet absorption spectrum of the neopentylperoxy radical, (CH 3 ) 3 CCH 2 O 2 (or C 5 H 11 O 2 ), and the kinetics of its self‐reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross‐section at 250 nm was determined to be and was used to normalize the radical absorption spectrum between 210 and 300 nm. Detailed modeling of the self‐reaction system was used to interpret the transient absorption kinetic decay curves over the temperature range 228–380 K, at total pressures between 25 and 100 torr. The results are discussed in relation to previous measurements of alkylperoxy radical spectra and kinetics.