Question

The IUPAC name of the compound is 4-(3-methyl-2-butenyl)-4-cyclopentene-1,3-dione.
If true enter 1, else enter 0.

Answer 1

The numbering of the parent compound is shown in black color whereas the numbering of the side chain is shown in red color.

The functional group with the highest priority in this compound is dione. Hence the two carbons bearing carbonyl groups should get the lowest possible number. The side chain is a four carbon chain with one methyl substituent and double bond in it. Hence it is named as 3-methyl-2-butenyl. Along with that, the five membered cyclic copound also has a double bond at carbon number 4. Hence the IUPAC name of this compound is 4-(3-methyl-2-butenyl)-4-cyclopentene-1,3-dione.

Hence, the correct answer is 1.