# What will be the product when C6H6Cl6 is heated with alc. KOH? Please explain the mechanim too.

Mar 7, 2018

The reaction will occur if all the $C l$ atoms are in same side ie syn and
the reaction will not occur if the $C l$ atoms are alternate syn and anti. Explanation is given below :-

#### Explanation:

NOTE :-

${E}_{2}$ reaction is Anti-elimination reaction so see in the picture given below :-

1) in first case the reaction will occur because the adjacent $C l$ and $H$ atoms are Anti, so elimination is possible.

2) in the second case the reaction will not occur because the adjacent $C l$ and $H$ atoms are Syn so elimination is not possible there in second case.

The reaction of Alkyl halide $\left(R X\right)$ with Strong base like alc. $K O H$ in the presence of heat is Elimination reaction and it follows the ${E}_{2}$ mechanism and this reaction gives Alkene as the final product along with the corresponding Hydrogen halide $\left(H X\right)$.

General ${E}_{2}$ reaction in the Presence of Heat :-

$R X + a l c K O H \rightarrow$Alkene $+ H X$