IUPAC name of the compound CH3−C|C2H5=CHCOCH3is

[Step 1]:The given compound is ketone.The IUPAC name of open chain aliphatic ketones are derived from the names of the corresponding alkanes by replacing the ending –e with –one.The longest carbon chain is numbered starting from the end nearer to the carbonyl group.The substituents are prefixed in alphabetical order along with numerals indicating their positions in the carbon chain.The substituent methyl (CH3) at C4.The position of double bond is at C3.