High-resolution discrete absorption spectrum of alpha-methallyl free radical in the vapor phase.
The alpha-methallyl free radical is formed in the flash photolysis of 3-methylbut-1-ene, and cis-pent-2-ene in the vapor phase, and then subsequent reactions have been investigated by kinetic spectroscopy and gas-liquid chromatography. The photolysis flash was of short duration and it was possible to follow the kinetics of the radicals' decay, which occurred predominantly by bimolecular recombination. The measured rate constant for the alpha-methallyl recombination was (3.5+/-0.3) x 10(10) mol(-1) ls(-1) at 295+/-2K. The absolute extinction coefficients of the alpha-methallyl radical are calculated from the optical densities of the absorption bands. Detailed analysis of related absorption bands and lifetime measurements in the original alpha-methallyl high-resolution discrete absorption spectrum image were also carried out by image processing techniques.
Bayrakçeken
Fuat
F
Department of Electronics Engineering, Yeditepe University, Istanbul 34755, Turkey. fubay@yeditepe.edu.tr
Telatar
Ziya
Z
Ari
Fikret
F
Tunçyürek
Lale
L
Karaaslan
Ipek
I
Yaman
Ali
A
D000498:Allyl Compounds / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*; D013054:Spectrophotometry, Atomic; D013055:Spectrophotometry, Infrared; D014835:Volatilization
D000498:Allyl Compounds; D005609:Free Radicals; D005740:Gases