| abstract |
There is described a process for the stabilization of compounds of the general formulan wherein X is Cl or Br and Z is hydrogen, halo, C 1 -C 4 alkyl or C 1 -C. alkoxy, which compounds are the kinetically controlled products of the reaction of equivalent amounts of a triaryl phosphite of the formulan and chlorine or bromine in a substantially anhydrous inert organic solvent, which comprises mixing the halogenating compounds in an inert organic solvent with a stabilizing amount of a tertiary amine base or a complexing agent selected from a Lewis acid-metal halide, phosphorous pentachloride or bromine; with the limitation that when X is Cl the complexing agent is not bromine. |