Advanced Organic Chemistry: H-1 NMR spectrum of cyclobutane

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

The H-1 hydrogen-1 (proton) 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 H-1 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

H-1 proton NMR spectroscopy - spectra index

low and high resolution H-1 proton nmr spectrum of cyclobutane analysis interpretation of chemical shifts ppm spin spin line splitting diagram H1 1-H nmr for cyclobutane doc brown's advanced organic chemistry revision notes

TMS is the acronym for tetramethylsilane, formula Si(CH3)4, whose protons are arbitrarily given a chemical shift of 0.0 ppm. This is the 'standard' in 1H NMR spectroscopy and all other proton shifts, called chemical shifts, depend on the individual (electronic) chemical environment of the hydrogen atoms in an organic molecule - cyclobutane here.

The chemical shifts quoted in ppm on the diagram of the H-1 NMR spectrum of cyclobutane represent the peaks of the intensity of the chemical shifts of (which are often groups of split lines at high resolution) AND the relative integrated areas under the peaks gives you the ratio of protons in the different chemical environments of the cyclobutane molecule.

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

Interpreting the H-1 NMR spectrum of cyclobutane

All 8 hydrogen atoms (protons) of cyclobutane occupy the same chemical environment so that the proton NMR spectrum only shows a single H-1 NMR chemical shift at 1.96 ppm (diagram above for cyclobutane).

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

However all 8 hydrogen atoms of cyclobutane appear to be in the same chemical environment and give the same chemical shift i.e. there are 8 equivalent protons in the cyclobutane molecule and just one single H-1 NMR resonance signal.

Number of protons 1H causing splitting Splitting pattern produced from the n+1 rule and the theoretical ratio of line intensities
0 means no splitting             1            
1 creates a doublet           1   1          
2 creates a triplet         1   2   1        
3 creates a quartet       1   3   3   1      
4 creates a quintet     1   4   6   4   1    
5 creates a sextet   1   5   10   10   5   1  
6 creates a septet 1   6   15   20   15   6   1

Key words & phrases: Interpreting the proton H-1 NMR spectra of cyclobutane, low resolution & high resolution proton nmr spectra of cyclobutane, H-1 nmr spectrum of cyclobutane, understanding the hydrogen-1 nmr spectrum of cyclobutane, explaining the line splitting patterns in the high resolution H-1 nmr spectra of cyclobutane, revising the H-1 nmr spectrum of cyclobutane, proton nmr of cyclobutane, ppm chemical shifts of the H-1 nmr spectrum of cyclobutane, explaining and analyzing spin spin line splitting in the H-1 nmr spectrum, how to construct the diagram of the H-1 nmr spectrum of cyclobutane, how to work out the number of chemically different protons in the structure of the cyclobutane organic molecule, how to analyse the chemical shifts in the hydrogen-1 H-1 proton NMR spectrum of cyclobutane using the n+1 rule to explain the spin - spin coupling ine splitting in the proton nmr spectrum of cyclobutane deducing the nature of the protons from the chemical shifts ppm in the H-1 nmr spectrum of cyclobutane examining the 1H nmr spectrum of  cyclobutane analysing the 1-H nmr spectrum of cyclobutane how do you sketch and interpret the H-1 NMR spectrum of cyclobutane

Links associated with cyclobutane

The chemistry of ALKANES revision notes INDEX

The infrared spectrum of cyclobutane

The mass spectrum of cyclobutane

The C-13 NMR spectrum of cyclobutane

H-1 proton NMR spectroscopy index  (Please read 8 points at the top of the 1H NMR index page)


All Advanced Organic Chemistry Notes

Use My Google search site box

Email doc b: