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Chemistry
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18 Nov 2019

Which carbon in methyl salicylate is responsible for the resonance at 170.6 ppm? Which is responsible for the resonance at 52.2 ppm?

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Patrina Schowalter
Patrina SchowalterLv2
23 Mar 2019
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Related questions

quick HNMR question

This question refers to the proton NMR spectrum of butanoic acid shown in Figure 8.39 in the lab text. In carboxylic acid nomenclature, the carbonyl carbon, i.e. the -COOH carbon, is numbered C1, and the other carbons are numbered accordingly. So the terminal methyl group in butanoic acid would be C4.

The same answer choices can be used for all of the questions.

1)What proton(s) is/are responsible for the broad signal at around 11.6 ppm?

a) the protons on C4, the terminal methyl group

b) the carboxylic acid proton, -COOH

c)the protons on C3, the methylene protons on the carbon next to C4

d)the protons on C2, the methylene carbon next to C1 the carbonyl carbon

2)What proton(s) is/are responsible for the triplet around 1.0 ppm?

3)What proton(s) is/are responsible for the sextet around 1.7 ppm?

4)What proton(s) is/are responsible for the triplet around 2.4 ppm?


Q: Please indicate the splitting of each signal and its relativeposition (ppm) in the NMR spectrum. Also, relative to the typicalposition of a methyl group in a 1H NMR spectrum (1.0 ppm), wherewould you expect the methyl groups in molecule C toresonate?



I know there is 4 signals, and I don't know each protons are sigletor doublet.
Ha = singlet or doublet? what is PPM?
Hb = singlet or doublet? what is PPM?
Hc = singlet or doublet? what is PPM?
Hd= singlet or doublet? what is PPM?

and where would you expect the methyl groups in molecule C toresonate? (plz draw the resonance of of the methyl group in themolecule.
Thanks.



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