Question

Which of the following functional groups exhibits the highest frequency in an infrared (IR) spectrum? *

Ester

Nitrile

Ketone

Alcohol

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Answer 1

Answer:

A nitrile has an IR frequency of about 2200cm-1, while an alcohol has a strong, broad peak at about 3400cm-

Answer 2

Alcohol as functional groups exhibits the highest frequency in an infrared (IR) spectrum.

Explanation:

a) An ester has a characteristic IR absorption peak at about 1750cm-1

b) A nitrile's (-RCN) characteristic IR absorbance peak is at about 2200cm-1.

c) A saturated ketone has an IR  absorption peak at about 1710cm-1, while an unsaturated ketone has an absorption between 1650cm-1 and 1700cm-1

d) An alcohol (-ROH) exhibits a strong, broad IR absorbance peak at about 3500cm-1.

Out of the given options, each functional group is having a peak at a fixed frequency range.

And Alcohol o=is having the highest frequency in an infrared spectrum.