INFRARED SPECTROSCOPY. What is infrared (IR) spectroscopy used for? To detect functional groups in all organic compounds and many inorganic compounds.

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Infrared Spectroscopy

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Presentation transcript:

INFRARED SPECTROSCOPY

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

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.

Correlation chart for infrared spectroscopy BondTypes of compoundRange/ cm -1 C-HAlkanes, Alkenes, Aldehydes O-HAlcohol Carboxylic acid broad N-HAmine sharp C-OAlcohols, carboxylic acids. esters C=O Aldehydes, ketones, carboxylic acids, esters C=CAlkenes C-ClChloroalkane C-BrBromoalkane C-IIodoalkane500

An infrared spectrum

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