Concept explainers
a)
Interpretation:
Two 1HNMR spectra belonging to crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH) are given. Which corresponds to which is to be explained.
1HNMR: Spectrum (a): 1.91 δ (Rel.area: 3.00), 5.83 δ (Rel.area: 1.00), 7.10 δ (Rel.area: 1.00), 12.21 δ (Rel.area: 1.00).
Concept introduction:
Crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH) can be easily distinguished by looking the signal for the methyl protons in these two compounds.
To explain:
Of the two 1HNMR spectra given, which belongs to crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH).
b)
Interpretation:
Two 1HNMR spectra belonging to crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH) are given. Which corresponds to which is to be explained.
1HNMR: Spectrum (b): 1.93 δ (Rel.area: 3.00), 5.66 δ (Rel.area: 1.00), 6.25 δ (Rel.area: 1.00), 12.24 δ (Rel.area: 1.00).
Concept introduction:
Crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH) can be easily distinguished by looking the signal for the methyl protons in these two compounds.
To explain:
Of the two 1HNMR spectra given, which belongs to crotonic acid (trans-CH3CH=CHCOOH) and methacrylic acid (H2C=C (CH3) COOH).
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Chapter 20 Solutions
Organic Chemistry
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- Predict the ¹H NMR spectrum of diethoxymethane.arrow_forwardAs we will learn in Chapter 20, reaction of (CH3)2CO with LiC ≡ CH followed by H2O affords compound D, which has a molecular ion in its mass spectrum at 84 and prominent absorptions in its IR spectrum at 3600–3200, 3303, 2938, and 2120 cm. D shows the following 1H NMR spectral data: 1.53 (singlet, 6 H), 2.37 (singlet, 1 H), and 2.43 (singlet, 1 H) ppm. What is the structure of D?arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning