Problem: A compound has infrared absorptions at the following frequencies: 3300 and 3385 cm-1 (both weak) and no band between 1600 and 1850 cm-1 Suggest the likely functional group that may be present.a) esterb) ketonec) carboxyl groupd) secondary aminee) alcoholf) etherg) aldehydeh) primary aminei) primary amidej) secondary amidek) tertiary aminel) tertiary amide

FREE Expert Solution
  • Two signals at 3300 and 3385 cm-1
  • no signals at 1600 and 1850 cm-1  →  suggests that C=O  is not present or any carboxylic acid derivative
  • no signals at 3400 cm-1 → suggests that -OH is not present
View Complete Written Solution
Problem Details

A compound has infrared absorptions at the following frequencies: 

3300 and 3385 cm-1 (both weak) and no band between 1600 and 1850 cm-1 

Suggest the likely functional group that may be present.

a) ester

b) ketone

c) carboxyl group

d) secondary amine

e) alcohol

f) ether

g) aldehyde

h) primary amine

i) primary amide

j) secondary amide

k) tertiary amine

l) tertiary amide


Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Infrared Spectroscopy Table concept. You can view video lessons to learn Infrared Spectroscopy Table. Or if you need more Infrared Spectroscopy Table practice, you can also practice Infrared Spectroscopy Table practice problems.