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Monday, 12 January 2015

1H-NMR and 13C-NMR spectra of 1,2,2-trichloropropane



The molecule has 3 different carbons, so the proton-spin decoupled 13C-NMR spectra will have 3 peaks. The molecule has only two different types of protons that are not coupled so the 1H-NMR will have two unsplit singlet signals.





Off-resonance-decoupled 13C-NMR Spectra of 1,2,2-trichloropropane. The CCl2 group appears as a singlet, the CH2Cl group appears as a triplet, and the CH3 group as a quartet.

The off-resonance-decoupled carbon spectrum will show the spin-spin splitting between the carbon and the hydrogen it has attached to it. The N+1 rule applies so a carbon with 3 hydrogens on it will give rise to a quartet, while a carbon with only 1 hydrogen will have a doublet. Carbons with no hydrogens attached to them will have singlet signals.





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