Question

Write the IUPAC names of the following:

${\mathrm{CH}}_3-\mathrm{CO}-{\mathrm{CH}}_3$

Answer 1

Determination of Root Word

• Here, the given compound represents the straight-chain structure of hydrocarbon.
• There are three carbon atoms in the longest chain.
• Hence, the root word will be ‘Prop’.

$\stackrel{3}{\mathrm{C}}{\mathrm{H}}_3-\stackrel{2}{\mathrm{C}}\mathrm{O}-\stackrel{1}{\mathrm{C}}{\mathrm{H}}_3$

Determination of name and position of locants

• In the given compound one Ketone group (-CO-) is present.
• The given compound has single bonds, So, it is a saturated hydrocarbon.

Determination of the suffix

• As this compound consists of a Ketone group (-CO-), the IUPAC name of the compound is obtained by replacing the last ‘e’ of the root alkane with ‘one' to indicate the presence of the Ketone group.
• Now, replace the last ‘e’ of Propane with 'one'.

The IUPAC name of the compound is "Propanone".