“…The exothermicities for chlorophenoxy radicals increase in the order 2-chlorophenoxyl < 2,4,6-trichlorophenoxyl < 2,4-dichlorophenoxyl < 2,4,5-trichlorophenoxyl. ,, The exothermicities for bromophenoxy radicals decrease in the order 2-bromophenoxyl > 2,4-dibromophenoxyl > 2,4,6-tribromophenoxyl . Cross-coupling of bromophenoxy and chlorophenoxy radicals and self-coupling of bromophenoxy radicals are much more exothermic than self-coupling of chlorophenoxy radicals. ,− Therefore, it can be inferred that, when both chlorinated and brominated phenoxy radicals are present, PBDD/Fs and PBCDD/Fs will form more readily than PCDD/Fs…”