1a) What characteristic band (frequency and corresponding functional group) is p

Question

1a) What characteristic band (frequency and corresponding functional group) is present in the infrared spectrum of the alcohol and not the ketone?

1b) What characteristic band (frequency and corresponding functional group) is absent in the infrared spectrum of the alcohol and present in the ketone?

1c) How could you detect from the infrared spectrum of the alcohol, the presence of some unreduced ketone in your product?

Ketone:

Alcohol:

Please answer all questions, photos have been posted (taken on an iphone). Thank you!

Explanation / Answer

1a) The characteristic band of alcohols is the O-H str that occurs at around 3200-3300 as abroad peak which is not present in the ketone.

1b) The characteristic peak of ketone carbonyl is a shapr band at 1714 which is absent in the alcohol specturm

1c) Once can identify the presence of some unreacted/unreduced ketone from Ir spectrum as a band present at 1714 in addition to the broad peak at 3300.

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