The frequency of the peak that most likely corresponds to the C=O stretch in the IR spectrum is at 1720 cm. Option C.
Calculation:
Depending on the nature of the atom and its bond to the group, the C=O bond can occupy different positions in the IR spectrum. An infrared spectrometer analyses a compound with the aid of passing infrared radiation, over a selection of different frequencies, thru a sample and measuring the absorptions made by way of each kind of bond inside the compound.
In general, stretching of c=0 bonds is observed from 1720 cm⁻¹ to 1740 cm⁻¹. Used to probe and identify chemicals or functional groups in solids, liquids, or gases. A spectrum is a graph with the amount of light absorbed on the y-axis and frequency on the x-axis.
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