Chlorobenzene radiolysis

However, Stern Volmer kinetics are obeyed for radiolysis studies of scavenging of toluene fluorescence with benzyl chloride. The electron scavengers CHCl and chlorobenzene reduce the fluorescence yields of arenes in a manner that suggests ... 

A modified ampoule preparation vessel was used to study the effect of gaseous products trapped in the polymer. A side arm with glass break-seal was added through which a solvent was introduced after irradiation (1.0 Mrad) of the polymer. Chlorobenzene (—0.3 cm3) was used as the solvent since its chromatographic retention time was significantly longer than the retention times for the radiolysis products. After dissolution, the irradiated polymer, volatile products and solvent were sealed into an ampoule and analysed as outlined above. The addition of solvent, dissolution and ampoule preparation were all performed in a closed system, i.e., the irradiated sample was never exposed to air. 

Pulsed-radiolysis of gas-phase systems containing C02 or N20 results in the production of oxygen atoms, which are in the triplet ground state. In the presence of small amounts of benzene, for example, an optical absorption is found to be formed after the pulse, with a maximum at 275 m and a shoulder in the region of 300 m/. Similar absorption spectra are found for other compounds. Rate constants for the process 0(3P) -f- X -> products are, where the compound X is given in parentheses and the rate constant is in units of 108 liter mole 1 sec. 1, 0.36 (benzene), 1.4 (toluene), 3.2 (ethylbenzene), 6.7 (o-xylene), 7.7 (m-xylene), 4.5 (p-xylene), 3.1 (chlorobenzene), 0.27 (fluorobenzene), and 1.0 (pyridine). The estimated limits of error are about 25%. 

Table 11. Radiolysis of chlorobenzene yields of major products . Dose = 208 kGy.

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