The relative reactivities of phenyl, p-chlarophenyl, and p-nitrophenyl radicals, derived from arylazotriphenylmethane, towards chlorine abstraction from carbon tetrachloride were estimated from the results of the competitive reaction of the radicals with carbon tetrachloride and iodine, assuming that the rate of scavenging of the radicals by iodine is almost invariant, irrespective of the substituent on the radical. On the basis of the results, the relative reactivities of these radicals in other elementary reactions such as hydrogen abstraction, bromine abstraction, addition to benzene or ally1 sulphide, and SH2 displacement on disulphide were estimated. These data show that p-chloroand p-nitro-phenyl radicals are more reactive than phenyl towards electron-donating substrates and less reactive towards electron-accepting substrates.

Syntheses, Characterizations, and Interconversion Reactions of cisand trans -Bis(2,4-pentanedionato)diaquachromium(III) Complexes. Application to the Cleavage Reactions of the Chromium-Carbon Bonds in trans -(Dichloromethyl and chloromethyl)bis(2,4-pentanedionato)aquachromium(III) Complexes in Aqueous Solutions

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