Question

When $n-$hexane is heated with anhydrous $AlC{l}_3$ and $HCl$ gas, the major products obtained is:

• A. $1$-chlorohexane
• B. $2$-chlorohexane
• C. $3$-chlorohexane
• D. hex-$3$-ene
• E. mixture of $2$-methylpentane and $3$-methylpentane

Answer 1

The correct option is E mixture of $2$-methylpentane and $3$-methylpentane

When $n-hexane$ is heated with anhydrous $AlC{l}_3$ and $HCl$ gas, at $573K$ under a pressure of about $30-35$ atmosphere, it isomerises to give a mixture of branched chain alkanes.

$\underset{n-hexane}{C{H}_3(C{H}_2{)}_{4}C{H}_3}\underset{Heat}{\overset{AlC{l}_3.HCl}{\to }}\underset{2-methylpentane}{C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{C}H}C{H}_{2}C{H}_{2}C{H}_3}+\underset{3-methylpentane}{H_{3}CC{H}_2-\underset{C{H}_3}{\underset{|}{C}H}C{H}_{2}C{H}_3}$