Question

The total number of structural isomers possible for an amine with molecular formula ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$?

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

The correct option is C

4

The explanation for the correct option:

C. 4

Structural isomers:

• Structural isomers are the isomers with the same molecular formula but the arrangements of atoms in a structure are different.
• The structural isomers can be further divided into three categories which are as follows:

1. Chain isomers
2. Position isomers
3. Functional group isomers

There are a total of four structural isomers for the compound with the molecular formula${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$, the isomers are shown below:

1. Butan-1-amine
2. 2-Methylprop-1-amine
3. Butan-2-amine
4. 2-Methylprop-2-amine

The explanation for incorrect options:

There are a total of four structural isomers for the compound with the molecular formula ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$, thus, options A, B, and D are incorrect.

Hence, the correct option is B i.e., 4.