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.

This article will provide a table containing the IR spectrum frequency values and the molecules they represent. What is a Spectrophotometer? List of stretching vibrations in descending order of frequency. Bending vibrations in descending order of frequency.

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.

2023年2月11日 · From there, a data table of approximate frequencies for different types of bonds has been created to use to help IR spectrum analysis. Table of Common IR Absorptions. Approximate Frequency (cm -1 )

IR Absorption Frequencies ; Typical IR Absorption Frequencies For Common Functional Groups. Bond Functional Group Frequency in cm −1 (Intensity*) C–H: Alkane: 3000–2850 (s) –CH 3: 1450 and 1375 (m)

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

2001年3月9日 · Functional Group Frequency (cm-1) intensity; water OH Stretch: 3700-3100: strong: alcohol OH stretch: 3600-3200: strong: carboxylic acid OH stretch: 3600-2500: strong

The carbonyl stretching absorption is one of the strongest IR absorptions, and is very useful in structure determination as one can determine both the number of carbonyl groups (assuming peaks do not overlap) but also an estimation of which types. Amide N-H Stretch: 3700 - 3500 (m)

Detailed information about the infrared absorptions observed for various bonded atoms and groups is usually presented in tabular form. The following table provides a collection of such data for the most common functional groups.