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What Is The Ratio Of The Protons In The Following Compound? ?

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September 22, 2021
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1. Which feature in the 1H NMR spectrum provides information about the number of types of different protons in a compound? A. number of signalsB. integralC. splittingD. chemical shift

You are watching: What is the ratio of the protons in the following compound?

2. Which feature in the 1H NMR spectrum provides information about the relative number of each type of proton in a compound? A. number of signalsB. integralC. splittingD. chemical shift

3. Which feature in the 1H NMR spectrum provides information about the electronic environment of the protons in a compound? A. number of signalsB. integralC. splittingD. chemical shift

4. Which feature in the 1H NMR spectrum provides information about the number of neighboring protons of each proton in the compound? A. number of signalsB. integralC. multiplicityD. chemical shift

5. Which of the following is not true regarding 1H NMR spectroscopy? A. “shielding” leads to peaks at lower values of dB. a “downfield” peak appears at a higher value of dC. d for a particular proton depends on the magnetic field strength of the instrument used.D. on a 300 MHz instrument, a proton that adsorbs irradiation at a frequency 1200 Hz higher than the adsorption of TMS appears at d 4 ppm.

6. Which of the following is not true regarding 1H NMR spectroscopy? A. a “downfield” peak appears at a lower value of dB. on a 300 MHz instrument, a proton that adsorbs irradiation at a frequency 900 Hz higher than the adsorption of TMS appears at d 3 ppm.C. d for a particular proton is independent of the magnetic field strength of the instrument used.D. “deshielding” leads to peaks at higher values of d

10. What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of ethane? A. singletB. doubletC. tripletD. quartet

11. What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of propane? A. singletB. doubletC. tripletD. quartet

12. What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of 1-bomo-2-methylpropane? A. singletB. doubletC. tripletD. nonet

13. Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3? A. a triplet and a doubletB. a quartet and a sextetC. two singletsD. a triplet and a quartet

14. Which of the following combinations of peaks appears in the 1H NMR spectrum of butane? A. a triplet and a doubletB. a triplet and a quartetC. a triplet and a sextetD. two singlets

15. Which of the following combinations of peaks appears in the 1H NMR spectrum of 2,3-dimethylbutane? A. two doubletsB. a doublet and a septetC. a singlet and two doubletsD. a doublet and an octet

16. Which of the following combinations of peaks appears in the 1H NMR spectrum of 1,2-dimethyoxyethane, CH3OCH2CH2OCH3? A. two singletsB. a singlet and a tripletC. a singlet and two tripletsD. a doublet and a triplet

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17. Which of the following combinations of peaks appears in the 1H NMR spectrum of 1,4-dimethyoxyethane, CH3OCH2CH2CH2CH2OCH3? A. three singletsB. a singlet, a triplet, and a quintetC. a singlet and two tripletsD. a doublet and a triplet

18. Which of the following combinations of peaks appears in the 1H NMR spectrum of 2-methylpropane? A. two singletsB. a singlet and a nonetC. a singlet and a decetD. a doublet and a decet

19. What is the appearance of the signal corresponding to the CH2 protons in the 1H NMR spectrum of ethyl methyl ether, CH3CH2OCH3? A. a doubletB. a tripletC. a quartetD. a septet

20. Which C4H9Br compound gives a triplet at approximately 3.5 ppm in the 1H NMR spectrum?

*

21. Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?

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22. What is the relative area of the six peaks in a sexet in an 1H NMR spectrum? A. 1:2:3:3:2:1B. 1:3:6:6:3:1C. 1:5:10:10:5:1D. 1:6:15:15:6:1

23. What is the relative area of the six peaks in a septet in an 1H NMR spectrum? A. 1:2:3:4:3:2:1B. 1:3:6:12:6:3:1C. 1:6:15:30:15:6:1D. 1:6:15:20:15:6:1

24. How many signals appear in proton-decoupled 13C NMR spectrum of 3,4-dimethylhexane? A. 3B. 4C. 5D. 6

25. How many signals appear in proton-decoupled 13C NMR spectrum of 2,5-dimethylhexane? A. 3B. 4C. 5D. 6

26. Which of the protons in the following molecule appear furthest downfield in the 1H NMR spectrum?

*

27. Which of the protons in the following molecule appear furthest downfield in the 1H NMR spectrum?

*

28. Which of the protons in the following molecule appear furthest downfield in the 1H NMR spectrum?

*

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29. Which of the protons in the following molecule appear at the highest d-value in the 1H NMR spectrum?

*

30. Which of the protons in the following molecule appear at the highest d-value in the 1H NMR spectrum?

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