Question 1

What is the relative area of the six peaks in a septet in an 1H NMR spectrum?

Accepted Answer

A)  1:2:3:4:3:2:1
B)  1:3:6:12:6:3:1
C)  1:6:15:30:15:6:1
D)  1:6:15:20:15:6:1E) B) and C)
F) A) and B)

Question 2

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled S1U1P113S1S1P0C NMR spectra. Enter the numerical value in the blank provided to the left of the structure.
-_______

Accepted Answer

The answer of For each of the compounds below tell...

Question 3

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled S1U1P113S1S1P0C NMR spectra. Enter the numerical value in the blank provided to the left of the structure.
-_______

Accepted Answer

The answer of For each of the compounds below tell...

Question 4

Which of the following compounds have homotopic protons?
1) propane
2) butane
3) 2-methylpropane

Accepted Answer

A)  only 1
B)  only 2
C)  only 1 and 2
D)  1, 2 and 3E) B) and C)
F) C) and D)

Question 5

Identify the compound (C4H8O2) that gives the following 1H NMR spectrum.

Accepted Answer

ethyl acet...

Question 6

MATCHING
The following questions pertain to the display of NMR spectra. Match a term to each description below.
-NMR spectrum are calibrated using an arbitrary scale that is divided into _____ units.

Accepted Answer

A)  TMS
B)  high-field or upfield side
C)  MHz
D)  delta ( δ\deltaδ ) 
E)  low-field or downfield sideF) chemical shiftG) intensity H) A) and F)
I) A) and B) D

Question 7

Which C9H10O compound gives the following 1H NMR spectrum? 9H10O compound gives the following 1H NMR spectrum?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and D)
F) None of the above

Question 8

All of the following compound produce only singlets in a 1H NMR spectrum.

Accepted Answer

A) True 
 B)False

Question 9

Identify the compound (C3H7Cl) that gives the following 1H NMR spectrum.

Accepted Answer

Question 10

MATCHING
The following questions pertain to the display of NMR spectra. Match a term to each description below.
-The calibration standard for 1H and 13C NMR is _____.

Accepted Answer

A)  TMS
B)  high-field or upfield side
C)  MHz
D)  delta ( δ\deltaδ ) 
E)  low-field or downfield sideF) chemical shiftG) intensity H) None of the above
I) B) and G)

Question 11

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. 
-_____The number of nonsinglet splitting patterns in the 1H NMR of this compound.

Accepted Answer

Question 12

Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum? 4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?   A) 1 B) 2 C) 3 D) 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) All of the above
F) A) and B)

Question 13

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled S1U1P113S1S1P0C NMR spectra. Enter the numerical value in the blank provided to the left of the structure.
-_______

Accepted Answer

The answer of For each of the compounds below tell...

Question 14

Identify the compound (C8H10) that gives the following 1H NMR spectrum.

Accepted Answer

p-xylene (...

Question 15

Which of the protons in the following molecule appear at the highest  δ\deltaδ -value in the 1H NMR spectrum? 1H NMR spectrum?   A) i B) ii C) iii D) iv " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  i
B)  ii
C)  iii
D)  iv E) C) and D)
F) B) and D)

Question 16

Which of the following compounds gives a 1H NMR spectrum consisting of only two triplets and a singlet?

Accepted Answer

A)  CH3CH(OCH3) 2
B)  CH3OCH2CH2CH2CH2OCH3
C)  CH3OCH2CH2OCH3
D)  CH3OCH2CH(OH) CH3E) A) and C)
F) A) and B) B

Question 17

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. 
-_____The number of nonequivalent hydrogen atoms in this compound.

Accepted Answer

The answer of Consider the following structure. Answer the following...

Question 18

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,2-dibromobenzene?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) All of the above
F) B) and D) C

Question 19

Identify the compound (C4H8O) that gives the following 1H NMR spectrum.

Accepted Answer

Question 20

All of the following would produce nuclear magnetic resonance: 2H, 14N, 16O, and 19F.

Accepted Answer

A) True 
 B)False

Exam 13: Nuclear Magnetic Resonance Spectroscopy

What is the relative area of the six peaks in a septet in an 1H NMR spectrum?

Correct AnswerverifiedShow Answer

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled 13C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct AnswerverifiedShow Answer

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled 13C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct AnswerverifiedShow Answer

Which of the following compounds have homotopic protons? 1) propane 2) butane 3) 2-methylpropane

Correct AnswerverifiedShow Answer

Identify the compound (C4H8O2) that gives the following 1H NMR spectrum.

Correct Answerverifiedethyl acet...View AnswerShow Answer

MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -NMR spectrum are calibrated using an arbitrary scale that is divided into _____ units.

Correct AnswerverifiedD

Which C9H10O compound gives the following 1H NMR spectrum?

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All of the following compound produce only singlets in a 1H NMR spectrum.

Correct AnswerverifiedShow Answer

Identify the compound (C3H7Cl) that gives the following 1H NMR spectrum.

Correct AnswerverifiedShow Answer

MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -The calibration standard for 1H and 13C NMR is _____.

Correct AnswerverifiedShow Answer

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. -_____The number of nonsinglet splitting patterns in the 1H NMR of this compound.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled 13C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct AnswerverifiedShow Answer

Identify the compound (C8H10) that gives the following 1H NMR spectrum.

Correct Answerverifiedp-xylene (...View AnswerShow Answer

Which of the protons in the following molecule appear at the highest δ\deltaδ -value in the 1H NMR spectrum?

Correct AnswerverifiedShow Answer

Which of the following compounds gives a 1H NMR spectrum consisting of only two triplets and a singlet?

Correct AnswerverifiedB

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. -_____The number of nonequivalent hydrogen atoms in this compound.

Correct AnswerverifiedShow Answer

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,2-dibromobenzene?

Correct AnswerverifiedC

Identify the compound (C4H8O) that gives the following 1H NMR spectrum.

Correct AnswerverifiedShow Answer

All of the following would produce nuclear magnetic resonance: 2H, 14N, 16O, and 19F.

Correct AnswerverifiedShow Answer

What is the relative area of the six peaks in a septet in an ¹H NMR spectrum?

Correct Answer
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For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled ¹³C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct Answer
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For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled ¹³C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct Answer
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Identify the compound (C₄H₈O₂) that gives the following ¹H NMR spectrum.

Correct Answer
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ethyl acet...
View Answer

Correct Answer
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D

Which C₉H₁₀O compound gives the following ¹H NMR spectrum?

Correct Answer
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All of the following compound produce only singlets in a ¹H NMR spectrum.

Correct Answer
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Identify the compound (C₃H₇Cl) that gives the following ¹H NMR spectrum.

Correct Answer
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MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -The calibration standard for ¹H and ¹³C NMR is _____.

Correct Answer
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Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. -_____The number of nonsinglet splitting patterns in the ¹H NMR of this compound.

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

Correct Answer
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For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband hydrogen-decoupled ¹³C NMR spectra. Enter the numerical value in the blank provided to the left of the structure. -_______

Correct Answer
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Identify the compound (C₈H₁₀) that gives the following ¹H NMR spectrum.

Correct Answer
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p-xylene (...
View Answer

Which of the protons in the following molecule appear at the highest $\delta$ -value in the ¹H NMR spectrum? $Which of the protons in the following molecule appear at the highest \delta -value in the <sup>1</sup>H NMR spectrum? A) i B) ii C) iii D) iv$

Correct Answer
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Which of the following compounds gives a ¹H NMR spectrum consisting of only two triplets and a singlet?

Correct Answer
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B

Correct Answer
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How many signals appear in the proton-decoupled ¹³C NMR spectrum of 1,2-dibromobenzene?

Correct Answer
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C

Identify the compound (C₄H₈O) that gives the following ¹H NMR spectrum.

Correct Answer
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All of the following would produce nuclear magnetic resonance: ²H, ¹⁴N, ¹⁶O, and ¹⁹F.

Correct Answer
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