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Advanced Organic Chemistry: Carbon-13 NMR spectrum of 1,2-dichloroethane

Interpreting the Carbon-13 NMR spectrum of 1,2-dichloroethane

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 1,2-dichloroethane

13C nmr spectrum of 1,2-dichloroethane C2H4Cl2 CH2ClCH2Cl analysis of chemical shifts ppm interpretation of C-13 chemical shifts ppm of 1,2-dichloroethane 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 - 1,2-dichloroethane here.

1,2-dichloroethane,  C2H4Cl2,  ClCH2-CH2Cl

Interpreting the C-13 NMR spectrum of 1,2-dichloroethane

As you can see from the diagram above there is only 1 chemical shift line in the C-13 NMR spectrum of 1,2-dichloroethane indicating just 1 chemical environments of the 2 carbon atoms of 1,2-dichloroethane.

ClCH2-CH2Cl

(Note the one colour indicating the single chemical environment of the 2 carbon atoms in 1,2-dichloroethane).

13C chemical shifts (a) only on the C-13 NMR spectrum diagram for 1,2-dichloroethane.

The two carbon atoms are equivalent to each other - identical chemical environments due to the symmetry of the molecule.

The carbon-13 NMR spectra provides direct evidence of just one carbon atom environments for the 2 carbon atoms in the 1,2-dichloroethane molecule, deduced from the presence of only one 13C NMR chemical shift (ppm).


Key words & phrases: C2H4Cl2 CH2ClCH2Cl ClCH2CH2Cl Interpreting the C-13 NMR spectra of 1,2-dichloroethane, C-13 nmr spectrum of 1,2-dichloroethane, understanding the carbon-13 nmr spectrum of 1,2-dichloroethane, explaining the line pattern in the high resolution C-13 nmr spectra of 1,2-dichloroethane, revising the C-13 nmr spectrum of 1,2-dichloroethane, ppm chemical shifts of the C-13 nmr spectrum of 1,2-dichloroethane, how to construct the diagram of the C-13 nmr spectrum of 1,2-dichloroethane, how to analyse the chemical shifts in the carbon-13 NMR spectrum of 1,2-dichloroethane deducing the chemical environment of all the carbon atoms in 1,2-dichloroethane examining the c13 nmr spectrum of  1,2-dichloroethane analysing the 13-c nmr spectrum of 1,2-dichloroethane how do you sketch and interpret the C-13 NMR spectrum of 1,2-dichloroethane interpreting interpretation of the C-13 NMR spectrum of 1,2-dichloroethane assignment of chemical shifts in the 13C NMR spectrum of 1,2-dichloroethane halide chloride chloro functional group


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