1. INFRARED SPECTROSCOPY

2. What is infrared (IR) spectroscopy used for? To detect functional groups in all organic compounds and many inorganic compounds Can be used to identify polymers, plastics and resins

3. Assigning Peaks Peaks are assigned depending on what range they appear in, and whether they are broad or sharp. A correlation chart will be supplied.

4. Correlation chart for infrared spectroscopy BondTypes of compoundRange/ cm -1 C-HAlkanes, Alkenes, Aldehydes3100-2800 O-HAlcohol3700-3300 Carboxylic acid3600-2500 broad N-HAmine3500-3100 sharp C-OAlcohols, carboxylic acids. esters1250-1050 C=O Aldehydes, ketones, carboxylic acids, esters 1850-1600 C=CAlkenes1500-1600 C-ClChloroalkane600-800 C-BrBromoalkane500-600 C-IIodoalkane500

5. An infrared spectrum www.chemguide.co.uk

6. Fingerprint region The fingerprint region is found on the right hand side of an infrared spectrum from about 1500- 500 cm -1. It can be used to compare two similar compounds.