Dr.Netty Siahaya.M.Si.  Involves the absorption of light in the infrared region of the electromagnetic spectrum  Used primarily to determine what.

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Presentation transcript:

Dr.Netty Siahaya.M.Si

 Involves the absorption of light in the infrared region of the electromagnetic spectrum  Used primarily to determine what functional groups are present in a molecule

The broad peak at around 3000 cm -1 indicates the presence of a hydroxyl group (OH) The strong, sharp peak at around 1750 cm - 1 indicates the presence of a carbonyl group

 Involves the absorption of light in the ultraviolet region of the electromagnetic spectrum  Used to determine the level of conjugation in the unknown  Conjugation is alternating single and double bonds  UV spectroscopy is not very useful in structure elucidation