Question

Write down true products when n-butyl trimethyl amine is heated strongly.

Answer 1

Quaternary amine undergoes $\beta$-elimination mainly by Hofmann's rule.

According to Hofmann's rule :"If alternate conditions exists hydrogen atom eliminates from such $\beta$-carbon atom which has maximum number of hydrogens".

${CH}_3-\stackrel{\stackrel{{CH}_3}{|}}{\underset{\underset{\underset{n-butyltrimethylamine}{{CH}_3}}{|}}{N^{+}}}-{CH}_2{CH}_2{CH}_2{CH}_3\stackrel{\Delta }{\to }$

${CH}_3-\underset{majorproduct}{{CH}_2}-CH={CH}_2+:\stackrel{\stackrel{{CH}_3}{|}}{\underset{\underset{{CH}_3}{|}}{N}}-{CH}_3$