Alkyl halides have been used as insecticides since the discovery of DDT in 1939. DDT was the

Question:

Alkyl halides have been used as insecticides since the discovery of DDT in 1939. DDT was the first compound to be found that had a high toxicity to insects and a relatively low toxicity to mammals. In 1972, DDT was banned in the United States because it is a long-lasting compound and its widespread use caused accumulation in substantial concentrations in wildlife. Chlordane is an alkyl halide insecticide that is used to protect wooden buildings from termites. Chlordane can be synthesized from two reactants in a one-step reaction. One of the reactants is hexachlorocyclopentadiene. What is the other reactant? (Hint: See Section 8.9.)