What is the IUPAC name of mesityl oxide? | vedclass

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(C) The structure of mesityl oxide is $(CH_3)_2C=CHCOCH_3$. To name this compound according to $IUPAC$ rules: $1$. Identify the longest carbon chain c

Vedclass · Accepted Answer

$4-$Methylpent$-3-$en$-2-$one

Vedclass · Answer

(C) The structure of mesityl oxide is $(CH_3)_2C=CHCOCH_3$. To name this compound according to $IUPAC$ rules: $1$. Identify the longest carbon chain containing the functional group (ketone) and the double bond. The chain has $5$ carbon atoms,so the parent alkane is pentane. $2$. Number the chain starting from the end closer to the ketone group: $C_1$ is the methyl carbon,$C_2$ is the carbonyl carbon,$C_3$ is the $CH$ group,$C_4$ is the $C$ group,and $C_5$ is the methyl group attached to $C_4$. $3$. The ketone is at position $2$,and the double bond starts at position $3$. There is a methyl group at position $4$. $4$. Combining these,the name is $4-$methylpent$-3-$en$-2-$one.

Column-$I$ (Common names)	Column-$II$ ($IUPAC$ names)
$A$. Cinnamaldehyde	$1$. Pentanal
$B$. Acetophenone	$2$. Prop-$2$-en-$al$
$C$. Valeraldehyde	$3$. $4$-Methylpent-$3$-en-$2$-one
$D$. Acrolein	$4$. $3$-Phenylprop-$2$-en-$al$
$E$. Mesityl oxide	$5$. $1$-Phenylethanone

What is the $IUPAC$ name of mesityl oxide?

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