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IR Tables, UCSC Table 1. Characteristic IR Absorption Peaks of Functional Groups* Vibration Position (cm-1) Intensity* Notes Alkanes C-H stretch 2990 – 2850 m to s Alkenes =C-H stretch 3100 – 3000 m C=C stretch 1680 – 1620 (sat.) 1650 – 1600 (conj.) w to m =C-H bend 995 – 685 s See Table 2 for detail Alkynes
Table of Characteristic IR Absorptions m=medium, w=weak, s=strong, n=narrow, b=broad, sh=sharp frequency, cm –1 bond functional group 3640–3610 (s, sh) O–H stretch, free hydroxyl alcohols, phenols 3500–3200 (s,b) O–H stretch, H–bonded alcohols, phenols
The following table lists infrared spectroscopy absorptions by frequency regions.
An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups.
An IR spectrometer consists of three basic components: radiation source, monochromator, and detector. A schematic diagram of a typical dispersive spectrometer is shown in Fig. 15.3. The common radiation source for the IR spectrometer is an inert solid heated electrically to 1000 to 1800 °C.
6.3 IR Spectrum and Characteristic Absorption Bands. With a basic understanding of IR theory, we will now take a look at the actual output from IR spectroscopy experiments and learn how to get structural information from the IR spectrum. Below is the IR spectrum for 2-hexanone. Figure 6.3a IR Spectrum of 2-hexanone.
Index IR-Spectroscopy & Physical Tables. IR-Window Material Infrared Tables. 2. 3. Near Infrared Table. 5. Sources. 6 Detectors Beamsplitters. Conversion Table of Energy and Wavelength Units for Far and Mid Infrared.
