Question 1

How many signals appear in the proton-decoupled 13C NMR spectrum of 3-bromotoluene?

Accepted Answer

A)  3
B)  4
C)  5
D)  7E) B) and D)
F) None of the above

Question 2

Which feature in the 1H NMR spectrum provides information about the electronic environment of the protons in a compound?

Accepted Answer

A)  number of signals
B)  integral
C)  splitting
D)  chemical shiftE) A) and B)
F) A) and C)

Question 3

How many sets of equivalent protons are there in hexane?

Accepted Answer

A)  2
B)  3
C)  6
D)  7E) A) and B)
F) All of the above

Question 4

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of ethane?

Accepted Answer

A)  singlet
B)  doublet
C)  triplet
D)  quartetE) A) and B)
F) All of the above

Question 5

Which C4H9Br compound(s)  gives a 13C NMR spectrum consisting of two signals? 4H9Br compound(s)  gives a 13C NMR spectrum consisting of two signals?   A) only 1 B) only 2 C) only 2 and 3 D) 1, 2, 3 and 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  only 1
B)  only 2
C)  only 2 and 3
D)  1, 2, 3 and 4E) A) and C)
F) A) and D)

Question 6

Which of the following combinations of peaks appears in the 1H NMR spectrum of 2,3-dimethylbutane?

Accepted Answer

A)  two doublets
B)  a doublet and a septet
C)  a singlet and two doublets
D)  a doublet and an octetE) B) and D)
F) B) and C)

Question 7

Which of the carbon atoms in the following molecule appears furthest downfield in the 13C NMR spectrum? 13C 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)  ivE) All of the above
F) C) and D)

Question 8

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

Accepted Answer

m-xylene (...

Question 9

MATCHING
The following questions pertain to the display of NMR spectra. Match a term to each description below.
-The exact place on the spectrum at which a nucleus absorbs is called its _____.

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 E)
I) A) and D)

Question 10

Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3?

Accepted Answer

A)  a triplet and a doublet
B)  a quartet and a sextet
C)  two singlets
D)  a triplet and a quartetE) C) and D)
F) All of the above

Question 11

Which C4H9Br compound(s)  gives a 13C NMR spectrum consisting of four signals? 4H9Br compound(s)  gives a 13C NMR spectrum consisting of four signals?   A) only 1 B) only 1 and 2 C) only 2 and 3 D) 1, 2, 3 and 4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 12

Which C6H12O2 compound gives the following 1H NMR spectrum? 6H12O2 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) None of the above
F) A) and B)

Question 13

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

Accepted Answer

A)  1,1-dibromopropane
B)  1,2-dibromopropane
C)  1,3-dibromopropane
D)  2,2-dibromopropaneE) All of the above
F) C) and D)

Question 14

Predict the splitting of each of the numbered hydrogen atoms in the structure below in a S1U1P11S1S1P0H NMR spectrum. Identify as singlet, doublet, triplet, quartet, quintet, sextet, septet, .... Place the correct splitting in the blank to the left of the number. 
-______ 1

Accepted Answer

The answer of Predict the splitting of each of the...

Question 15

Which C8H10 compound gives the following 1H NMR spectrum? 8H10 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) None of the above
F) C) and D)

Question 16

Which of the following combinations of peaks appears in the 1H NMR spectrum of butane?

Accepted Answer

A)  a triplet and a doublet
B)  a triplet and a quartet
C)  a triplet and a sextet
D)  two singletsE) B) and C)
F) A) and B)

Question 17

Which C8H10 compound gives the following 1H NMR spectrum? 8H10 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 C)
F) C) and D)

Question 18

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of propane?

Accepted Answer

A)  singlet
B)  doublet
C)  triplet
D)  quartetE) A) and B)
F) None of the above

Question 19

How many signals appear in proton-decoupled 13C NMR spectrum of 3,4-dimethylhexane?

Accepted Answer

A)  3
B)  4
C)  5
D)  6E) None of the above
F) B) and C)

Question 20

Which of the following is true for pair of homotropic protons?
1) They will appear at the same chemical shift in an achiral (i.e., nonchiral)  environment
2) They will appear at the same chemical shifts in a chiral environment

Accepted Answer

A)  only 1
B)  only 2
C)  neither 1 nor 2
D)  both 1 and 2E) A) and B)
F) A) and C)

Exam 13: Nuclear Magnetic Resonance Spectroscopy

How many sets of equivalent protons are there in hexane?

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Which C4H9Br compound(s) gives a 13C NMR spectrum consisting of four signals?

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Which of the following combinations of peaks appears in the 1H NMR spectrum of 2,3-dimethylbutane?

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Which of the following is true for pair of homotropic protons? 1) They will appear at the same chemical shift in an achiral (i.e., nonchiral) environment 2) They will appear at the same chemical shifts in a chiral environment

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Which of the following combinations of peaks appears in the 1H NMR spectrum of butane?

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Which C8H10 compound gives the following 1H NMR spectrum?

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Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3?

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

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Which feature in the 1H NMR spectrum provides information about the electronic environment of the protons in a compound?

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How many signals appear in proton-decoupled 13C NMR spectrum of 3,4-dimethylhexane?

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MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -The exact place on the spectrum at which a nucleus absorbs is called its _____.

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Predict the splitting of each of the numbered hydrogen atoms in the structure below in a 1H NMR spectrum. Identify as singlet, doublet, triplet, quartet, quintet, sextet, septet, .... Place the correct splitting in the blank to the left of the number. -______ 1

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Which C6H12O2 compound gives the following 1H NMR spectrum?

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Which C4H9Br compound(s) gives a 13C NMR spectrum consisting of two signals?

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Which of the carbon atoms in the following molecule appears furthest downfield in the 13C NMR spectrum?

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What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of ethane?

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

Correct Answerverifiedm-xylene (...View AnswerShow Answer

How many signals appear in the proton-decoupled 13C NMR spectrum of 3-bromotoluene?

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Which C8H10 compound gives the following 1H NMR spectrum?

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What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of propane?

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Which C₄H₉Br compound(s) gives a ¹³C NMR spectrum consisting of four signals?

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Which of the following combinations of peaks appears in the ¹H NMR spectrum of 2,3-dimethylbutane?

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Correct Answer
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Which of the following combinations of peaks appears in the ¹H NMR spectrum of butane?

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Which C₈H₁₀ compound gives the following ¹H NMR spectrum?

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Which of the following combinations of peaks appears in the ¹H NMR spectrum of diethyl ether, CH₃CH₂OCH₂CH₃?

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

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Which feature in the ¹H NMR spectrum provides information about the electronic environment of the protons in a compound?

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How many signals appear in proton-decoupled ¹³C NMR spectrum of 3,4-dimethylhexane?

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Correct Answer
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Predict the splitting of each of the numbered hydrogen atoms in the structure below in a ¹H NMR spectrum. Identify as singlet, doublet, triplet, quartet, quintet, sextet, septet, .... Place the correct splitting in the blank to the left of the number. -______ 1

Correct Answer
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Which C₆H₁₂O₂ compound gives the following ¹H NMR spectrum?

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Which C₄H₉Br compound(s) gives a ¹³C NMR spectrum consisting of two signals?

Correct Answer
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Which of the carbon atoms in the following molecule appears furthest downfield in the ¹³C NMR spectrum?

Correct Answer
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What is the splitting of the signal in the ¹H NMR spectrum for the methyl protons of ethane?

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

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m-xylene (...
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How many signals appear in the proton-decoupled ¹³C NMR spectrum of 3-bromotoluene?

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Which C₈H₁₀ compound gives the following ¹H NMR spectrum?

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What is the splitting of the signal in the ¹H NMR spectrum for the methyl protons of propane?

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