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Table 1. Characteristic IR Absorption Peaks of Functional Groups* * Abbreviations: s = strong; m = medium; w = weak; br = broad; sat. = saturated; conj. = conjugated ** Alcohols, Esters, Carboxylic Acids, and Anhydrides also absorb in the fingerprint region due to the C-O stretch (1300 – 1000, s). Table 2.
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
IR-Spectroscopy & Physical Tables IR-Window Material Infrared Tables Near Infrared Table Sources Detectors Beamsplitters Conversion Table of Energy and Wavelength Units for Far and Mid Infrared Conversion Table of Energy and Wavelength Units for Near Infrared, Visible and UV Conversion Table of Transmittance and Absorbance Units SI Unit System ...
Infrared Tables (short summary of common absorption frequencies) The values given in the tables that follow are typical values. Specific bands may fall over a range of
An important tool of the analytic and organic chemists is Infrared (IR) Spectroscopy. IR spectra are acquired on a special instrument, called an IR spectrometer. IR is used to gather information about compound's structure, assess its purity, and sometimes to identify it.
IR Flowchart to determine functional groups in a compound (all values in cm-1). All IR values are approximate and have a range of possibilities depending on the molecular environment in which the functional group resides. Resonance often modifies a peak's position because of electron delocalization (C=O lower, acyl C-O higher, etc.).
Infrared Tables (short summary of common absorption frequencies) The values given in the tables that follow are typical values. Specific bands may fall over a range of
