4.1: Introduction to Infrared Spectroscopy - Chemistry LibreTexts
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WebMar 16, 2023 · 4.1: Introduction to Infrared Spectroscopy. Page ID. Thomas Wenzel. Bates College. Infrared radiation is the proper energy to excite vibrations in molecules. The IR spectrum consists of near (4,000-12,800 cm -1 ), mid (200-4,000 cm -1) and far (10-200 cm -1) regions. The mid-IR region is most commonly used for analysis purposes.
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