Question

The number of primary amines of formula $C_4{H}_{11}N$ is:

• A. $2$
• B. $1$
• C. $4$
• D. $3$

Answer 1

Answer: (C)

$4$

1) $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_2-N^{1^o}{H}_2$

2) $C{H}_3-\underset{H}{\underset{|}{\stackrel{C{H}_3}{\stackrel{|}{C}}}-}C{H}_2-N^{1^o}{H}_2$

3) $H_2\stackrel{C{H}_{2}C{H}_3}{\stackrel{|}{C}-C}{H}_2-N^{1^o}{H}_2$

4) $H_{3}C-\stackrel{H_{3}C}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}-}{N}^{1^o}{H}_2$

$C_4{H}_{11}N$ isomers which are $1^o$ amines are as shown.

Hence answer is $4$.