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

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

Advanced Organic Chemistry: Carbon-13 NMR spectrum of cyclobutane

Scroll down and take time to study the content and/or follow links or [Use the website search box]

Interpreting the Carbon-13 NMR spectrum of cyclobutane

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 C-13 NMR spectra of cyclobutane

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

C-13 NMR spectroscopy - spectra index

13C nmr spectrum of cyclobutane C4H8 analysis of chemical shifts ppm interpretation of C-13 chemical shifts ppm of cyclobutane C13 13-C nmr doc brown's advanced organic chemistry revision notes 

TMS is the acronym for tetramethylsilane, formula Si(CH3)4, whose 13C atoms are arbitrarily given a chemical shift of 0.0 ppm. This is the 'standard' in 13C NMR spectroscopy and all other 13C resonances, called chemical shifts, are measured with respect to the TMS, and depend on the individual (electronic) chemical environment of the 13C atoms in an organic molecule - cyclobutane here.

Cyclobutane, C4H8 , alkanes structure and naming (c) doc b, alkanes structure and naming (c) doc b

Interpreting the C-13 NMR spectrum of cyclobutane

As you can see from the diagram above there is only one chemical shift line in the C-13 NMR spectrum of cyclobutane indicating just one chemical environments of the 4 carbon atoms of cyclobutane.

13C chemical shift (a) 22.4 ppm on the C-13 NMR spectrum diagram for cyclobutane.

The carbon-13 NMR spectra provides direct evidence of only one carbon atom environment for the 4 carbon atoms in the cyclobutane molecule, deduced from the presence of just one 13C NMR chemical shift of 22.4 ppm.

Cyclobutane is NOT a true planar molecular arrangement in terms of the four carbon atoms because the square is slightly folded.

However all 4 hydrogen atoms of cyclobutane appear to be in the same chemical environment and give the same chemical shift i.e. there are 4 equivalent carbon atoms in the cyclobutane molecule and just one single 13C NMR resonance signal.


Key words & phrases: C4H8 Interpreting the C-13 NMR spectra of cyclobutane, C-13 nmr spectrum of cyclobutane, understanding the carbon-13 nmr spectrum of cyclobutane, explaining the line pattern in the high resolution C-13 nmr spectra of cyclobutane, revising the C-13 nmr spectrum of cyclobutane, ppm chemical shifts of the C-13 nmr spectrum of cyclobutane, how to construct the diagram of the C-13 nmr spectrum of cyclobutane, how to analyse the chemical shifts in the carbon-13 NMR spectrum of cyclobutane deducing the chemical environment of all the carbon atoms in cyclobutane examining the c13 nmr spectrum of  cyclobutane analysing the 13-c nmr spectrum of cyclobutane how do you sketch and interpret the C-13 NMR spectrum of cyclobutane interpreting interpretation of the C-13 NMR spectrum of cyclobutane assignment of chemical shifts in the 13C NMR spectrum of cyclobutane type functional group


Links associated with cyclobutane

The chemistry of ALKANES revision notes INDEX

The infrared spectrum of cyclobutane

The mass spectrum of cyclobutane

The H-1 NMR spectrum of cyclobutane

C-13 NMR spectroscopy index

ALL SPECTROSCOPY INDEXES

All Advanced Organic Chemistry Notes

Use My Google search site box

Email doc b: chem55555@hotmail.com

 Doc Brown's Chemistry 

*

TOP OF PAGE