Question

Trichloroacetaldehyde, $CCl_3CHO$ reacts with chlorobenzene in presence of sulphuric acid and produces

• A. bis(4-chlorophenyl)(trichloromethyl)methane
• B. 4-chlorophenyl(trichloromethyl)methane
• C. bis(2-chlorophenyl)(trichloromethyl)methane
• D. 4-chlorophenyl(dichloromethyl)methane

Answer 1

Answer: (A)

bis(4-chlorophenyl)(trichloromethyl)methane

Answer 2

The reaction is an electrophilic aromatic substitution. Chloral ($CCl_3CHO$) reacts with chlorobenzene in the presence of sulfuric acid to form DDT, which is bis(4-chlorophenyl)(trichloromethyl)methane. The chlorine atom on chlorobenzene is an ortho, para director. Due to steric hindrance, the para product is favored.