Radiolysis of Carbon Tetrachloride in the Presence of Oxygen

The radiolysis of air-saturated solutions of iodine: An undergraduate experiment involving an isosbestic point

“…When 02 is added to the solution, the only additional product is COCl2 (12). Its 100-ev yield is 12 (12), and that for Cl2 is increased to approximately 3.0 (11,12). The present experiment establishes that when I2 is added to oxygenated solutions, the only iodine-containing product is ICI.…”

“…In oxygen-free, pure CCb, the only products are CiCU and Cl2, and they are formed in equal yields (G values) of 0.7 moleeules/100 ev (9~11). When 02 is added to the solution, the only additional product is COCl2 (12). Its 100-ev yield is 12 (12), and that for Cl2 is increased to approximately 3.0 (11,12).…”

“…The following reactions involving CC13 radicals and Cl atoms, the predominant reactive intermediates, have been proposed as the mechanism for the radiolysis of CCl4-02 solutions (11,12).…”

“…1 + 1 -I, (12) The net result of reactions (11) and ( 12) is that two molecules of IC1 are produced for every molecule of I2 that is decomposed. Other intermediates in the system may also react with I2, but they too lead to the formation of IC1 as the only iodine-containing compound.…”