Important Absorptions in Infrared Spectroscopy

These flashcards cover the important absorptions in infrared spectroscopy, detailing the key functional groups and their corresponding stretch ranges.

C=O Stretch

Strong band range from 1670 to 1830 cm^-1.

C=C Stretch

Medium-strong band range from 1600 to 1700 cm^-1.

C≡C Stretch

Medium band range from 2000 to 2200 cm^-1.

C≡N Stretch

Medium band range from 2000 to 2500 cm^-1.

C-H Stretch

Strong band range from 2800 to 3300 cm^-1.

O-H Stretch

Strong broad band range from 3200 to 3700 cm^-1.

N-H Stretch

Medium band at 3500 cm^-1.

Amide

Functional group characterized by a C=O (carbonyl) and N-H bond, typically observed around 1690 cm^-1.

Carboxylic Acid

Functional group with O-H stretch around 3200-3700 cm^-1 and C=O stretch around 1710 cm^-1.

Ketone/Aldehyde

C=O stretch typically observed around 1715 cm^-1.

Ester

Functional group with C=O stretch approximately at 1735 cm^-1.

Acid Chloride

C=O stretch typically around 1810 cm^-1.