The normal range for the carbonyl group of acetophenone resp

The normal range for the carbonyl group of acetophenone responsible for the peak at 1700 on its IR spec is shifted to the right and is out of its normal IR range. What phenomenon caused this shift in absorbance?

a. conjugation

b. resonance

c. sterics

d. ring currents

Acetophenone: phenyl-C-CH3

                                ll

                                O

Solution

A) conjugation In acetophenone ,the carbonyl is conjugated with double bonds of the aromatic ring therefore the IR spec is shifted ti the right