Question

11 multiple choice 2 points name the compound shown below. 3 - propylcyclopenta - 1,3 - diene 2 - propylcyclopenta - 1,3 - diene 1 - propylcyclopenta - 2,5 - diene 3 - propylcyclopenta - 2,4 - diene

Explanation:

Step1: Determine the base name

The compound is a cyclic diene with five carbon atoms in the ring. So, the base name is cyclopenta - diene.

Step2: Locate the double bonds

Number the ring to give the double bonds the lowest possible numbers. Here, the double bonds are at positions 1 and 3.

Step3: Name the substituent

The substituent is a propyl group ($-CH_{2}CH_{2}CH_{3}$). Number the ring so that the substituent gets the lowest possible number. When we number the ring for the double bonds (positions 1 and 3), the propyl group is at position 3.

So, the name of the compound is 3 - propylcyclopenta - 1,3 - diene.

Answer:

3 - propylcyclopenta - 1,3 - diene