HOME PAGE * KS3 SCIENCES * GCSE BIOLOGY CHEMISTRY PHYSICS * ADVANCED LEVEL CHEMISTRY

SPECTROSCOPY INDEXES  *  All Advanced Organic Chemistry Notes  *  [SEARCH BOX]

Advanced Organic Chemistry: Infrared spectrum of propyl methanoate

Interpreting the infrared spectrum of propyl methanoate

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 propyl methanoate

infrared spectrum of propyl methanoate C4H8O2 HCOOCH2CH2CH3 wavenumbers cm-1 functional group detection fingerprint pattern identification of propyl formate doc brown's advanced organic chemistry revision notes 

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

Propyl methanoate (propyl formate)   (c) doc b    (c) doc b    (c) doc b 

Interpretation of the infrared spectrum of propyl methanoate

The most prominent infrared absorption lines of propyl methanoate

C-H stretching vibration absorptions occur in the wavenumber region 2975 to 2860 cm-1.

Not very important, common to most organic molecules.

For saturated aliphatic esters, C=O stretching vibration absorptions occur in the wavenumber region 1750 to 1735 cm-1.

This is a very characteristic absorption for any molecule e.g. an ester like propyl methanoate, with a C=O carbonyl group.

For ethanoate esters, C-O stretching vibration absorptions occur in the wavenumber region 1200 to 1180 cm-1.

The absence of other specific functional group bands will show that a particular functional group is absent from the propyl methanoate molecular structure e.g. no hydroxyl group vibration at ~3500 to 3200 cm-1., obviously not expected for an ester like propyl methanoate, but expected for a carboxylic acid like the isomeric butanoic acid.

The absence of other specific functional group bands will show that a particular functional group is absent from the propyl methanoate molecular structure.


Key words & phrases: C4H8O2 HCOOCH2CH2CH3 image and diagram explaining the infrared spectrum of propyl methanoate, complete infrared absorption spectrum of propyl methanoate, comparative spectra of propyl methanoate, prominent peaks/troughs for identifying functional groups in the infrared spectrum of propyl methanoate, important wavenumber values in cm-1 for peaks/troughs in the infrared spectrum of propyl methanoate, revision of infrared spectroscopy of propyl methanoate, fingerprint region analysis of propyl methanoate, how to identify propyl methanoate from its infrared spectrum, identifying organic compounds like propyl methanoate from their infrared spectrum, how to analyse the absorption bands in the infrared spectrum of propyl methanoate detection of ester functional groups in the propyl methanoate molecule example of the infrared spectrum of a molecule like propyl methanoate with a ester functional group  interpreting interpretation of the infrared spectrum of propyl methanoate shows presence of ester functional group formula ester functional group propyl formate


Links associated with propyl methanoate

The chemistry of CARBOXYLIC ACIDS and DERIVATIVES revision notes INDEX

Infrared spectroscopy index

ALL SPECTROSCOPY INDEXES

All Advanced Organic Chemistry Notes

Use My Google search site box

Email doc b: chem55555@hotmail.com

TOP OF PAGE

 Doc Brown's Chemistry 

*

TOP OF PAGE