Explain enol form of all these options in diagram and explain how can highest enol content check
Dear Student,
Correct order is C>B>D>A
Reason:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5c65a745b07f6.png)
As stabalization by resonance is stronger than hyperconjugation. So, the order is as given above.
Moreover to check if enol is stable:
Check the number of alpha hydrogens : more alpha hydrogens, more is hyperconjugation and so more is stability
Check the possibilities of aromatic ring conjugation: more chances of ring conjugation, more is stability
Check the chances of Hydrogen bonding with carbonyl group (chelation): It is to compare monoketone with diketones. Only diketones like given above can show intramolecular hydrogen bonding. All those given above undergo intramolecular hydrogen bonding.
Regards
Correct order is C>B>D>A
Reason:
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5c65a745b07f6.png)
As stabalization by resonance is stronger than hyperconjugation. So, the order is as given above.
Moreover to check if enol is stable:
Check the number of alpha hydrogens : more alpha hydrogens, more is hyperconjugation and so more is stability
Check the possibilities of aromatic ring conjugation: more chances of ring conjugation, more is stability
Check the chances of Hydrogen bonding with carbonyl group (chelation): It is to compare monoketone with diketones. Only diketones like given above can show intramolecular hydrogen bonding. All those given above undergo intramolecular hydrogen bonding.
Regards