science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: allyl radical				Other Names: 

Formula: C3H5; CH2CH=CH2				CAS-No.: 1981-80-2

Study: uv absorption spectra


Authors: M.E. Jenkin, T.P. Murrells, S.J. Shalliker, G.D. Hayman

Title: Kinetics and product study of the self-reactions of allyl and allyl peroxy radicals at 296 K

Journal/Source: J. Chem. Soc. Faraday Trans., 89, 433-446, (1993); DOI: 10.1039/FT9938900433


Data: table, diagram

Energy/Wavelength range: 210 - 232.5 nm

Resolution: 

Temperature: 296 K

Temperature dependence: no

Pressure/Concentration: total pressures near atmospheric pressure

Phase: gas

pH:


Comments: The laser flash photolysis technique, coupled with UV absorption spectroscopy, has been used to investigate 
the UV spectra and kinetics of reactions of the allyl radical (CH2CHCH2) and the allyl peroxy radical (CH2CHCH2O2) at 
296 K and total pressures near atmospheric.
The absolute absorption cross-section near the maximum is sigma(220 nm)=(5.8 ± 0.8) × 10-17 cm2 molecule-1.
The UV absorption spectrum of CH2CHCH2O2, characterised in the wavelength range 210-300 nm, is typical of an organic 
peroxy radical, with a peak cross-section of (6.2 ± 0.9) × 10-18 cm2 molecule-1 at 235 nm.

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