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The "" hydrogen atoms of carbonyl compou...

The `"______"` hydrogen atoms of carbonyl compounds (i.e aldehydes and ketones) are acidic protons.

A

alpha

B

beta

C

gamma

D

omega

Text Solution

Verified by Experts

The correct Answer is:
A
Ionization of an `alpha-H` atom as proton yields a carbanion (I) that is a resonance hybrid of two structures, (II) and (III):

Note that resonance structure (III), in which the negative charge resides on oxygen (the electronegative atom that can best accomodate it), makes the large contribution to resonace hybrid I.
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