| abstract |
method for preparing compounds of the formulan which comprises reaction compounds of the formulan with compounds of the formulan for a sufficient time and sufficient temperature to form said compound: wheren a is 0 or an integer greater than 0; b is 0 or an integer greater than 0; n = 0 or an integer greater than 0; m = 0 or an integer greater than 0; R' f and R, are independently selected from the group consisting of F, Cl, perfluoroalkyl radicals and fluorochloroalkyl radicals; X = F, CI, or Br or mixtures thereof when n > O; X' is independently Cl or Br; Y = I, F, Cl, or Br. |