Which region in the ir spectrum could be used to distinguish between butanoic acid and 2-butanone?.

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16-09-2022
Chemistry

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Which region in the ir spectrum could be used to distinguish between butanoic acid and 2-butanone?.

Answer :

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qwgrey qwgrey · Answer 1 · 2022-09-19T15:48:18-04:00

The region in the IR spectrum could be used to distinguish between butanoic acid and 2-butanone is 2500-3300 cm^-1.

What is IR spectrum:

IR spectroscopy (which is short for infrared spectroscopy) deals with the infrared region of the electromagnetic spectrum, i.e. light having a longer wavelength and a lower frequency than visible light. Infrared Spectroscopy generally refers to the analysis of the interaction of a molecule with infrared light.

The IR spectroscopy concept can generally be analyzed in three ways: by measuring reflection, emission, and absorption. The major use of infrared spectroscopy is to determine the functional groups of molecules, relevant to both organic and inorganic chemistry.

Therefore,

For carboxylic acid, a broad peak for -OH group is obtained in the region of 3000-2500 cm-1 in the IR spectrum. This is the distinguishing feature of -COOH or carboxylic group of butanoic acid and -CO or ketone of butanone. Both shows -CO or carbonyl peak in the region 1680-1750 cm-1, but the above mentioned distinguishes them.

To know more about "IR Spectrum"

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