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  4. The IUPAC name of the compound CH3 - CH (CH3) - CO - CH3 is

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Q. The IUPAC name of the compound $CH_3 - CH (CH_3) - CO - CH_3$ is

UPSEEUPSEE 2018

Solution:

(i) For the structure,

image

Functional group is ketone, hence its secondary suffix is ‘one’. Now, the longest carbon chain containing the functional group has $4$ carbon atom.

$\therefore $ The word root is ‘but’.

(ii) Further, since the longest chain is saturated, therefore its primary suffix is ‘ane’.

(iii) Number the carbon atoms right to left, it given lowest vacant $2$ to functional group image and vacant $3$ to substituent methyl group.

$\therefore $ The $IUPAC$ name is $3$-methyl-$2$-butanone.