Transcription of Table 1: Principal IR Absorptions for Certain Functional ...
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Table 1: Principal IR Absorptions for Certain Functional ...
Table 1: Principal IR Absorptions for Certain Functional Groups absorption Ranges(cm-1). Functional group Names Type of Vibration & [Look for a single absorption causing IR absorption in these regions, unless stated otherwise.]. Example compounds 3000-2800 H-C-H Asymmetric &. Alkanes: Symmetric Stretch (Note: The Absorptions can be seen as several H distinct peaks in this region.). H H. C Methane H 1500-1440 H-C-H Bend C=C-H Asymmetric Alkenes: 3100-3000. Stretch H. H C-C=C Symmetric H3C C 1-Propene 1675-1600. H. Stretch 3300-3200 C H Stretch Alkynes: HC C CH3 Propyne 2200-2100 C C Stretch Aromatic Rings: C=C-H Asymmetric 3100-3000. H Stretch H C H C-C=C Symmetric C C 1600-1580. C C. Benzene Stretch H C H. C-C=C Asymmetric H 1500-1450. Stretch Phenols & Alcohols: Hydrogen-bonded O-H. H. 3600-3100. H Stretch H C OH H OH.
Table 1: Principal IR Absorptions for Certain Functional Groups Functional Group Names & Example compounds Absorption Ranges(cm-1) [Look for a single absorption in these regions, unless stated otherwise.] Type of Vibration causing IR absorption 3000-2800 (Note: The absorptions can be seen as several distinct peaks in this region.)
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