Question

Identify the functional group present in the following compound and name according to the IUPAC system: ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{COOH}$

Answer 1

Part 1:

1. The given compound is ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{COOH}$.
2. The chemical name is Butanoic acid.
3. The group attached to the first Carbon is $-\mathrm{COOH}$.
4. The functional group present in Carboxyl group.

Part 2:

Step: 1 Determination of Root Word

1. Here the chain is having $4$ Carbon atoms, hence root word will be “But”
2. $\stackrel{4}{\mathrm{C}}{\mathrm{H}}_3\stackrel{3}{\mathrm{C}}{\mathrm{H}}_2\stackrel{2}{\mathrm{C}}{\mathrm{H}}_2\stackrel{1}{\mathrm{C}}\mathrm{OOH}$

Step: 2 Determination of names and positions of Locants

1. There is one functional group (Carboxyl group) at the first position.

Step: 3 Determination of Suffix

1. As this compound is having a carboxyl functional group, suffix will be “oic-acid”

Name of the compound: Butanoic Acid.