Question

Which of the following carbonyl oxygens will form the strongest hydrogen bond with $H_{2}O$ molecules?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Structure (b) will form the strongest $H$-bond with $H_{2}O$ because it is quasi aromatic due to which it has complete negative charge on oxygen. As we know, more the negative charge on $O$, stronger will be the $H$-bond.