Spectroscopy - MCAT Chemical and Physical Foundations of Biological Systems

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Question

An IR spectroscopy reading of a compound shows a large absorption at . What is the identity of this compound?

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Answer

Compounds with an alcohol group show absorptions in an IR sprectrum from through . Therefore an absorption of would correspond to an alcohol. Amide groups show absorptions from through . Amine groups show absorptions from through , through , through and through (aromatic amines). Carbonyl compounds such as aldehydes show strong absorptions in the IR spectrum at through .

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