Question

What happens when tertiary butyl alcohol is passed over heated copper at ${300}^0$C ?

• A. Secondary butyl alcohol is formed.
• B. 2-Methylpropene is formed .
• C. 1-Butene is formed .
• D. Butanal is formed.

Answer 1

The correct option is B 2-Methylpropene is formed .

Tertiary alcohol when passed over $Cu$ at ${300}^{\circ }C$ is dehydrated to alkene.

$C{H}_3-\underset{\underset{C{H}_3}{|}}{\stackrel{\stackrel{C{H}_3}{|}}{C}}-OH\stackrel{Cu,{300}^{0}C}{⟶}C{H}_3-\underset{\underset{C{H}_3}{|}}{\stackrel{\stackrel{C{H}_2}{||}}{C}}$

$t-butylalcohol\stackrel{Cu,{300}^{0}C}{⟶}2-methylpropene$