Question

17. Which of the following protons gives an NMR signal with the lowest chemical shift value (farthest upfield)? F-CH2CH2CH2CH2CH2-Br 1 2 3 4 5 A) 1 B) 2 C) 3 D) 4 E) 5 18. Which of the following protons gives an NMR signal with the highest chemical shift value (farthest downfield)? (CH3)2CH-O-CH2CH2CH3 1 2 3 4 5 A) 1 B) 2 C) 3 D) 4 E) 5 19. Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in 1H NMR spectroscopy? I. CH3NH2 IV. CH3CH2CH3 II. CH3OH V. Benzene-CH3 III. CH3COCH3 A) I B) II C) III D) IV E) V

          17. Which of the following protons gives an NMR signal with the lowest chemical shift value (farthest upfield)?
F-CH2CH2CH2CH2CH2-Br
1 2 3 4 5
A) 1 B) 2 C) 3 D) 4 E) 5
18. Which of the following protons gives an NMR signal with the highest chemical shift value (farthest downfield)?
(CH3)2CH-O-CH2CH2CH3
1 2 3 4 5
A) 1 B) 2 C) 3 D) 4 E) 5
19. Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in 1H NMR spectroscopy?
I. CH3NH2 IV. CH3CH2CH3
II. CH3OH V. Benzene-CH3
III. CH3COCH3
A) I B) II C) III D) IV E) V

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17. Which of the following protons gives an NMR signal with the lowest chemical shift value (farthest upfield)?
F-CH2CH2CH2CH2CH2-Br
1 2 3 4 5
A) 1 B) 2 C) 3 D) 4 E) 5
18. Which of the following protons gives an NMR signal with the highest chemical shift value (farthest downfield)?
(CH3)2CH-O-CH2CH2CH3
1 2 3 4 5
A) 1 B) 2 C) 3 D) 4 E) 5
19. Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in 1H NMR spectroscopy?
I. CH3NH2 IV. CH3CH2CH3
II. CH3OH V. Benzene-CH3
III. CH3COCH3
A) I B) II C) III D) IV E) V

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Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Madhur L

01/06/2023

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The chemical shift in NMR spectroscopy is influenced by the electron density around the nucleus. The more electron-dense the environment, the more shielded the nucleus is, and the lower the chemical shift. Conversely, the less electron-dense the environment, the Show more…

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A) II B) III C) IV D) V CH3; A CH3OH A CH3CH2CH3, CH3CH2CH2CH3, CH3CH2NH2 in IH NMR spectroscopy? shift 19. Which of the following methyl groups will exhibit the most downfield (highest) chemical shift? E) 5 C) 3 B) 2 [(V (CH3)2CH2CH2CH2CH3 (farthest downfield)? Which of the following protons gives an NMR signal with the highest chemical shift value? E) D) - C) 3 B) 2 Br ZHOZHOZHOZHOZHJ-1 protons gives an NMR signal with the lowest chemical shift value? downfield following (farthest the Jo 4?IYAI 'LI D)

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