Mesityl oxide is a common name of

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(D) Mesityl oxide is an $\alpha, \beta-$unsaturated ketone formed by the aldol condensation of acetone. Its chemical structure is $(CH_3)_2C=CHCOCH_3$

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

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(D) Mesityl oxide is an $\alpha, \beta-$unsaturated ketone formed by the aldol condensation of acetone. Its chemical structure is $(CH_3)_2C=CHCOCH_3$. According to $IUPAC$ nomenclature,the longest carbon chain containing the ketone group has $5$ carbons. The double bond is at position $3$ and the ketone group is at position $2$. There is a methyl group at position $4$. Therefore,the $IUPAC$ name is $4-$Methylpent$-3-$en$-2-$one.

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