When benzene is treated with chlorine under the influence of ultraviolet
light, a solid material of \(\mathrm{m}\). wt. 291 is formed. Quantitative
analysis gives an empirical formula of \(\mathrm{CHC} 1 .\)
(a) What is the molecular formula of the product? (b) What is
a possible structural formula? (c) What kind of reaction has taken place? (d)
Is the product aromatic? (e) Actually, the product can be isolated into six
isomeric compounds, one of which is used as an insecticide (Gammexane or
Lindane). How do these isomers differ from each other? (f) Are more than six
isomers possible?
