Ncert Exercises & Solutions

The correct IUPAC name for ${CH}_{2} = {CHCH}_{2} {NHCH}_{3}$ is

1. Allyl methylamine

2. 2-Amino-4-pentene

3. 4-Aminopent-1-ene

4. N-methylprop-2-en-1-amine

Hint: Priority must be given to amine group not double bond.

In the given compound numbering must be start from right to left because amine give higher priority than double bond. The numbering in the compound is shown below

\overset{3}{C} H_{2} = \overset{2}{CH} {\overset{1}{CH}}_{2} {NHCH}_{3}

The parent chain contains thre carbon atoms hence "prop" is used for that, for double bond "en" is used as suffix and for

- {NH}_{2}

group amine is used as suffix.

The IUPAC name of the compound is as follows:

N-methylprop-2-en-1-amine

Hence. option (d) is correct.

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