Advanced Organic Chemistry: Infrared spectrum of propylbenzene

SITEMAP * HOME PAGE * SEARCH * GCSE Level Chemistry age ~14-16 * Advanced Level Chemistry age ~16-19

Interpreting the infrared spectrum of propylbenzene (1-phenylpropane)

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 propylbenzene

email doc brown

Use your mobile phone or ipad etc. in 'landscape' mode

This is a BIG website, you need to take time to explore it

Infrared spectroscopy - spectra index

C9H12 infrared spectrum of propylbenzene wavenumbers cm-1 functional group detection fingerprint pattern identification of 1-phenylpropane doc brown's advanced organic chemistry revision notes 

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

propylbenzene (1-propylbenzene), C9H12 , C6H5CH2CH2CH3 , (c) doc b  , (c) doc b 

Interpretation of the infrared spectrum of propylbenzene

The most prominent infrared absorption lines of propylbenzene

Strong absorption at wavenumbers 3080 to 3030 cm-1 due to =C-H aryl C-H stretching vibrations.

Strong C-H stretching vibrations from the alkyl groups (CH2 and CH3) at wavenumbers 2975 to 2845 cm-1.

C=C benzene ring vibrations with peaks close to wavenumbers 1600 and 1500 cm-1.

C-H side-chain alkyl vibrations are observed at wavenumbers 1470 to 1370 cm-1.

Other aryl C-H vibration absorptions occur at wavenumbers 770 to 690 cm-1 characteristic of a monosubstituted benzene ring.

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

Key words & phrases: C9H12 C6H5CH2CH2CH3 image and diagram explaining the infrared spectrum of propylbenzene, complete infrared absorption spectrum of propylbenzene, comparative spectra of propylbenzene, prominent peaks/troughs for identifying functional groups in the infrared spectrum of propylbenzene, important wavenumber values in cm-1 for peaks/troughs in the infrared spectrum of propylbenzene, revision of infrared spectroscopy of propylbenzene, fingerprint region analysis of propylbenzene, how to identify propylbenzene from its infrared spectrum, identifying organic compounds like propylbenzene from their infrared spectrum, how to analyse the absorption bands in the infrared spectrum of propylbenzene detection of  functional groups in the propylbenzene molecule example of the infrared spectrum of a molecule like propylbenzene with a functional group interpreting interpretation of the infrared spectrum of propylbenzene shows presence of functional group 1-phenylpropane n-propylbenzene

Links associated with propylbenzene

The chemistry of AROMATIC COMPOUNDS revision notes INDEX

Infrared spectroscopy index


All Advanced Organic Chemistry Notes

Use My Google search site box

Email doc b: