Question

Which chlorinated dioxin congeners are most likely formed with the following compounds as precursors?

a. 2,4-dichlorophenol and 2,4,6-trichlorophenol

b. 2,4,6-trichlorophenol and 2,3,4,6-tetrachlorophenol

c. two molecules of 2,4,6-trichlorophenol

d. Two molecules of pentachlorophenol

Note: this is NOT a multiple choice question. Each part is its own question

Answer 1

page-t Answert Dioxins which are polychlorinated and commonly called as dibenzo-p-dioxing ( PC DDs) are world's most toxic compounds and pollutants which originate from thermal and combustion operations, (generally on solid surfaces) These are generally byproducts of reactions. These are the group of compounds having two benzene sing Connected to two each other by two Oxygen atom . Here benzene sings are chlorinated. now in our question, precursors are given, and we have to write the product. @ 2,9 -dichloro phenol and 2,4,6-tri chloro phenol. ryou drom A / Need a d a (biaryl synthesis ? I w d 12,4-dichloro l Phenol 12,4,6-trichlorof - Phenol -2HCl 4, 6- trichlorophenol and 2,3,4,6- tetrachlorophenol ith Www Wm www C dy01 - + TVA (high temp), cod d el Ho Y -2HCl not 12,4,6- trichloro, .. thenol 12,3, 96 tetras I chloro- phenol) The mechanism follows biaryl Synthesis, in which molecule of Hel teame to form oxin. The reaction generally occur at high temp (200-3000e.

page-2 © Two molecule of 2,4,6- trichloro phenol — Ис( Two molecule of penta chloro phenol c 0N-7 TUI ce + Tire -zne no