Question 1 What functional groups are shown in the IR spectr

Question 1 What functional groups are shown in the IR spectrum shown below? nitrile (i.e., RCN) None of these other choices is correct. ketone ester carboxylic acid aldehyde alcohol

Solution

answer -alcohol

IR shows broad peak at ~ 3300 cm-1

Which indicates presence of alcohol

Frequences for given functional groups

nitrile ~ 2150 cm-1

ketone ~ 1700 cm-1

Ester ~ 1730 cm-1

Acid ~ 3500-2500 cm-1 and 1710 cm-1

aldehyde ~ C-H streching at 2700 cm-1 and C=O at 1710 cm-1

alcohol ~ ~3400 cm-1