When carbon tetrachloride is treated with excess of Benzene in presence of `AlCl_3`, the product formed is.

Options

A. Only`(C_6H_5)_3 C Cl`
B. Only `(C_6H_5)_4` C
C. A mixture of a and b
D. None of the two

Answer

A

Explanation

Fourth chlorine atom of the `C Cl_4` cannot be replaced by phenyl group because the carbocation required for the introduction of the fourth phenyl group is too stable to react with benzene .
`(C_6H_3)_3 C Cl overset(AlCl_3)to underset("Highly stable")((C_6H_5)_3 C^(oplus) AlCl_4^(Ɵ))`
Due to steric factor 4th nucleo philic cannot attack at carbon atom.