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Advanced Organic Chemistry: Infrared spectrum of 1,2-dichloroethane

Interpreting the infrared spectrum of 1,2-dichloroethane

Doc Brown's Chemistry Advanced Level Pre-University Chemistry Revision Study Notes for UK IB KS5 A/AS GCE advanced A level organic chemistry students US K12 grade 11 grade 12 organic chemistry courses involving molecular spectroscopy analysing infrared spectra of 1,2-dichloroethane

infrared spectrum of 1,2-dichloroethane C2H4Cl2 CH2ClCH2Cl wavenumbers cm-1 functional group detection fingerprint pattern identification of 1,2-dichloroethane doc brown's advanced organic chemistry revision notes 

Spectra obtained from a liquid film of 1,2-dichloroethane. The right-hand part of the of the infrared spectrum of 1,2-dichloroethane, wavenumbers ~1500 to 400 cm-1 is considered the fingerprint region for the identification of 1,2-dichloroethane and most organic compounds. It is due to a unique set of complex overlapping vibrations of the atoms of the molecule of 1,2-dichloroethane.

1,2-dichloroethane,  C2H4Cl2,  ClCH2-CH2Cl

Interpretation of the infrared spectrum of 1,2-dichloroethane

The most prominent infrared absorption lines of 1,2-dichloroethane

As with any molecule with an alkyl group in the molecule, like 1,2-dichloroethane, C-H stretching vibrations occur at wavenumbers 2975 to 2845 cm-1 and 1470 to 1340 cm-1.

For 1,2-dichloroethane, there are series of C-Cl vibrations bands of various modes at wavenumbers 800 to 580 cm-1.

The absence of other specific functional group bands will show that a particular functional group is absent from the 1,2-dichloroethane molecular structure.


Key words & phrases: C2H4Cl2 CH2ClCH2Cl ClCH2CH2Cl image and diagram explaining the infrared spectrum of 1,2-dichloroethane, complete infrared absorption spectrum of 1,2-dichloroethane, comparative spectra of 1,2-dichloroethane, prominent peaks/troughs for identifying functional groups in the infrared spectrum of 1,2-dichloroethane, important wavenumber values in cm-1 for peaks/troughs in the infrared spectrum of 1,2-dichloroethane, revision of infrared spectroscopy of 1,2-dichloroethane, fingerprint region analysis of 1,2-dichloroethane, how to identify 1,2-dichloroethane from its infrared spectrum, identifying organic compounds like 1,2-dichloroethane from their infrared spectrum, how to analyse the absorption bands in the infrared spectrum of 1,2-dichloroethane detection of functional groups in the 1,2-dichloroethane molecule example of the infrared spectrum of a molecule like 1,2-dichloroethane with a functional group  interpreting interpretation of the infrared spectrum of 1,2-dichloroethane shows presence of functional group halide chloride chloro functional group


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