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Identify the carbon atoms that give rise to the signals in the
a.
b.
c.
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Chapter 12C Solutions
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- Compound 1 has molecular formula C7H16. It shows three signals in the 1H-NMR spectrum, one at 0.85 ppm, one at 1.02 ppm, and one at 1.62 ppm. The relative integrals of these three signals are 6, 1, and 1, respectively. Compound 2 has molecular formula C7H14. It shows three signals in the 1H-NMR spectrum, one at 0.98 ppm, one at 1.36 ppm, and one at 1.55 ppm. The relative integrals of these three signals are 3, 2, and 2, respectively. Propose structures for compounds 1 and 2, explaining how you reach your conclusion.arrow_forwardCompound 1 has molecular formula C6H12. It shows three signals in the 1H-NMR spectrum, one at 0.96 ppm, one at 2.03 ppm, and one at 5.33 ppm. The relative integrals of these three signals are 3, 2, and 1, respectively. Compound 2 has molecular formula C7H15Br. It shows two signals in the 1H-NMR spectrum, one at 1.08 ppm and one at 1.59 ppm. The relative integrals of these two signals are 3 and 2, respectively. Propose structures for compounds 1 and 2, explaining how you reach your conclusion.arrow_forward14. Compound B has molecular formula C9H12. It shows five signals in the 1H-NMR spectrum - a doublet of integral 6 at 1.22 ppm, a septet of integral 1 at 2.86 ppm, a singlet of integral 1 at 5.34 ppm, a doublet of integral 2 at 6.70 ppm, and a doublet of integral 2 at 7.03 ppm. The 13C-NMR spectrum of B shows six unique signals (23.9, 34.0, 115.7, 128.7, 148.9, and 157.4). Identify B and explain your reasoning.arrow_forward
- A ¹H NMR spectrum is shown for a molecule with the molecular formula of CaHsO. Draw the structure that best fits this data. esc K Select to Draw с 0 Searcarrow_forwardWhich structure of molecular formula, C4H8C12, fits the proton NMR spectrum shown below? 11 10 8 5 3 ppm HSP-00-228 CI CI CI .CI CI O CI, CIarrow_forwardA'H NMR spectrum is shown for a molecule with the molecular formula of CeH9Br. Draw the structure that best fits this data.arrow_forward
- 3. Consider the isomers A, B and C given below: CH3 CH3 CH3 Br в A Br Br 3-Bromomethylbenzene 4-Bromomethylbenzene 2-Bromomethylbenzene (c) For each compound how many chemically different carbon signals would you expect to see in their 1°C NMR spectra? B = C = A =arrow_forwardWhat is the structure from the formula C10H12 and the spectra?arrow_forwardCH3 2. An unknown isomer of C4H9Cl has the ¹³C NMR and DEPT-135 spectra shown below: 13C NMR: 90 70 |||| A 50 8 (ppm) CH3CH₂CH₂ CH₂ CI 30 10 DEPT-135: CH3 CH3-CHCH₂-CI B 90 70 Circle the compound that is represented by these spectra. Clearly explain your reasoning. you will need to explain how each of the other three isomers was eliminated from consideration. 50 8 (ppm) CH3CH₂ CH-CI CH3 C 30 10 CH3 CH3-C-CI CH3 Darrow_forward
- 13. Which compound has four distinct signals in its 13C NMR spectrum? أن لا يا بنا I II III IV Br Varrow_forwardHow many peaks in the H-NMR spectrum of cyclobutanol?arrow_forwardH H Predict the ¹³C NMR chemical shift of the circled carbon in the structure below. H H I .H H A) 5-40 ppm B) 40-80 ppm C) 110-160 ppm D) 165-180 ppm E) 200-210 ppmarrow_forward
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