Advanced Organic Chemistry: Infrared spectrum of 1,3-dioxane

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Interpreting and explaining the infrared spectrum of 1,3-dioxane

[Author © Dr Phil Brown PhD: Doc Brown's advanced level organic chemistry exam revision notes suitable for students of UK A level chemistry courses & US K12 grade 11, grade 12 and AP honors chemistry courses: Molecular spectrometry - analysing the infrared spectra of 1,3-dioxane [spectra page updated April 3rd 2026 *]

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 Infrared spectroscopy - spectra index


Introductory note on the infrared spectrum of 1,3-dioxane  

Students and teachers please note my explanation of the infrared spectrum of 1,3-dioxane  is designed for advanced, but pre-university, chemistry courses.

Based in the infrared spectrum diagram for 1,3-dioxane , only some of the most prominent peaks for particular bond vibrations are discussed, particularly if 1,3-dioxane  has a functional group with a particular characteristic wavenumber peak.

The infrared spectrum of 1,3-dioxane  is unique and the whole, or selected wavenumbers, can be used to fingerprint its identity, sometimes analysing a mixture containing 1,3-dioxane  or following its change of concentration in a reaction.

infrared spectrum of 1,3-dioxane C4H8O2 wavenumbers cm-1 functional group detection fingerprint pattern identification of 1,3-dioxane doc brown's advanced organic chemistry revision notes 

Spectra obtained from a liquid film of 1,3-dioxane. The right-hand part of the of the infrared spectrum of 1,3-dioxane, wavenumbers ~1500 to 400 cm-1 is considered the fingerprint region for the identification of 1,3-dioxane and most organic compounds. It is due to a unique set of complex overlapping vibrations of the atoms of the molecule of 1,3-dioxane.

Interpretation of the infrared spectrum of 1,3-dioxane

The most prominent infrared absorption lines of 1,3-dioxane

There are no particular characteristic lines, just the usual C-H stretching and bending and deformation vibrations you observe with any organic molecule with alkyl groups e.g. ~3000 to 2800 and 1480 to 1365 cm-1.

You get C-O stretching vibrations for cyclic ethers at wavenumbers ~940 and 1140 to 1070 cm-1.

The absence of other specific functional group bands will show that a particular functional group is absent from the 1,3-dioxane molecular structure.


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Links associated with 1,3-dioxane

The infrared spectrum of 1,2-dioxane (a cyclic peroxide), not available?

The infrared spectrum of 1,3-dioxane (a cyclic ether)

The infrared spectrum of 1,4-dioxane (a cyclic ether)

The mass spectrum of 1,2-dioxane (a cyclic peroxide), not available?

The mass spectrum of 1,3-dioxane (a cyclic ether)

The mass spectrum of 1,4-dioxane (a cyclic ether)

The H-1 spectrum of 1,2-dioxane (a cyclic peroxide)

The H-1 spectrum of 1,3-dioxane (a cyclic ether)

The H-1 spectrum of 1,4-dioxane (a cyclic ether)

The C-13 spectrum of 1,2-dioxane (a cyclic peroxide)

The C-13 spectrum of 1,3-dioxane (a cyclic ether)

The C-13 spectrum of 1,4-dioxane (a cyclic ether)

Infrared spectroscopy index

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