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Which of these would have a peak in the proton NMR which would disappear when D20 is added? OH но OH C В A and C O C and D O A O C O A and D A, C, and D

Which of these would have a peak in the proton NMR which would disappear when D20 is added? OH но OH C В A and C O C and D O A O C O A and D A, C, and D

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:** Which of these would have a peak in the proton NMR that would disappear when D₂O is added? **Structures:** - **A:** Cyclohexanol (a cyclohexane with an -OH group) - **B:** Cyclohexanone (a cyclohexane with a carbonyl group, =O) - **C:** Cyclohexanecarbaldehyde (a cyclohexane with an aldehyde group, -CHO) - **D:** 1,2-Cyclohexanediol (a cyclohexane with two -OH groups in vicinal positions) **Answer Choices:** - ○ B - ○ A and C - ○ C and D - ○ A - ○ D - ○ C - ○ A and D - ○ A, C, and D **Explanation:** The question is focused on identifying compounds that contain proton exchangeable groups (-OH or -NH) which, when deuterated using D₂O, will lose protons in NMR analysis due to hydrogen-deuterium exchange, thus causing the disappearance of their respective peaks in the proton NMR spectrum.
Transcribed Image Text:**Question:** Which of these would have a peak in the proton NMR that would disappear when D₂O is added? **Structures:** - **A:** Cyclohexanol (a cyclohexane with an -OH group) - **B:** Cyclohexanone (a cyclohexane with a carbonyl group, =O) - **C:** Cyclohexanecarbaldehyde (a cyclohexane with an aldehyde group, -CHO) - **D:** 1,2-Cyclohexanediol (a cyclohexane with two -OH groups in vicinal positions) **Answer Choices:** - ○ B - ○ A and C - ○ C and D - ○ A - ○ D - ○ C - ○ A and D - ○ A, C, and D **Explanation:** The question is focused on identifying compounds that contain proton exchangeable groups (-OH or -NH) which, when deuterated using D₂O, will lose protons in NMR analysis due to hydrogen-deuterium exchange, thus causing the disappearance of their respective peaks in the proton NMR spectrum.
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NMR spectroscopy is a very important tool for the determination of the structure of the organic compound.

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