The infrared spectra of organic compounds are associated with transitions between vibrational energy levels. Molecular vibrations may be detected and measured either in an infrared spectrum or indirectly in a Raman spectrum. The most useful vibrations, from the point of view of the organic chemist, occur in the narrower range of 3.5–16 μm (1 μm = 10−6 m). The position of an absorption band in the spectrum may be expressed in microns (μm), but standard practice uses a frequency scale in the form of wavenumbers, which are the reciprocals of the wavelength, cm−1. The useful range of the infrared for an organic chemist is between 4000 cm−1 at the high-frequency end and 600 cm−1 at the low-frequency end.
CITATION STYLE
Fleming, I., & Williams, D. (2019). Infrared and Raman Spectra BT - Spectroscopic Methods in Organic Chemistry. (I. Fleming & D. Williams, Eds.). Springer International Publishing. Retrieved from https://doi.org/10.1007/978-3-030-18252-6_3
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