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INFRARED SPECTROSCOPY (IR)

1 INFRARED SPECTROSCOPY (IR)Theory and Interpretation of IR spectraASSIGNED READINGS Introduction to technique 25 (p. 833-834 in lab textbook) Uses of the INFRARED spectrum (p. 847-853) Look over pages 853-866 after viewing this presentation for additional examples of various functional groups. Emphasis is on data interpretation, not on data memorization. 2 ORGANIC STRUCTURE DETERMINATIONHow do we know: how atoms are connected together? Which bonds are single, double, or triple? What functional groups exist in the molecule? If we have a specific stereoisomer?

The IR spectrum is basically a plot of transmitted (or absorbed) frequencies vs. intensity of the transmission (or absorption). Frequencies appear in the ... Carbonyl compounds are those that contain the C=O functional group. In aldehydes, this group is at the end of a carbon chain, whereas in ketones it’s in ...

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