Question about ring expansion

Why doesn’t this structure undergo a ring expansion because it has a cyclopentane but would prefer a cyclohexane structure? Similarly to how it would expand if we were doing an acid catalyzed hydration with h2so4, where it would expand.

Is it because the oxymercuration step is a lot in itself with the formation of the resonance hybrid structure that the ring doesn’t open?! Or does it open and for ochem 1 it’s too advanced?!

Thanks!

Why doesn’t this structure undergo a ring expansion because it has a cyclopentane but would prefer a cyclohexane structure? Similarly to how it would expand if we were doing an acid catalyzed hydration with h2so4, where it would expand.

Is it because the oxymercuration step is a lot in itself with the formation of the resonance hybrid structure that the ring doesn’t open?! Or does it open and for ochem 1 it’s too advanced?!

Thanks!