Match the following 1H NMR spectrum with one of the given compounds. Match signals to the…
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Question “Match the following 1H NMR spectrum with one of the given compounds. Match signals to the…”
Match the following 1H NMR spectrum with one of the given
compounds. Match signals to the protons on the structure.
Answer
spectrum a
2-bromopropane
The CH3 is available as a doublet at 1.75 ppm, and the CH3 as a quartet at 2.25 ppm. All were shielded by the bromine.
spectrum b
nitropropane CH3CH2CH2NO2
The CH3 at 0.9 as triplet; the CH2 secnd carbon at 2ppm in quintet; and the CH2 attached at NO2 as a triplet at much lowerfield at 4.3ppm
Spectrum C is composed of butanone CH3CH2COCH3
The triplet of the C4 CH3 is at 1.0 less shielded than expected. The CH2 is at 2.4 as an ensemble and the CH2 at 2.5 as a trio.
Conclusion
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