Question

Why does 5-Hydroxycyclopent-2-enone is right and 2-Hydroxycyclopent-4-enone is wrong?​

Answer 1

Answer:5-Hydroxycyclo-2-enone

Explanation:

First decide priority for main functional group, here it is ketone so assign it number 1. Then decide position for saturation, here alkene, so decide it 2nd position and then assign position to substituent functional group, here alcohol.