Question 1

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 2

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

Accepted Answer

ethyl acet...

Question 3

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

Accepted Answer

A)   CH3OCH2CH2OCH2CH3
B)   CH3OCH2CH2CH2CH2OH
C)   CH3OC(CH3) 2OCH3
D)   CH3OCH2CH(CH3) OCH3E) A) and C)
F) A) and B)

Question 4

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) C) and D)
F) A) and B)

Question 5

Identify the most appropriate intensity maintained for a pure ethanol NMR spectrum.

Accepted Answer

A)   1:2:3
B)   5:1
C)   4:3:2
D)   6:3:1E) A) and B)
F) All of the above

Question 6

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) A) and D)
F) B) and D)

Question 7

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

Accepted Answer

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

Question 8

Consider the compound shown below.  The above compound would produce a signal further downfield in a 13C NMR spectrum than

Accepted Answer

A) True 
 B)False

Question 9

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) B) and D)
F) B) and C)

Question 10

Identify the physical factor that influences the coupling constant.

Accepted Answer

A)   Hybridization
B)   Cryomagnetic ratio
C)   Chemical exchange
D)   Karplus empirical formulaE) A) and B)
F) All of the above

Question 11

Which of the following compounds would give a 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals? 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals?   A)  only i B)  only iii C)  only i and iii D)  iii and iv" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   only i
B)   only iii
C)   only i and iii
D)   iii and ivE) B) and C)
F) All of the above

Question 12

How many sets of equivalent protons are there in 3-methylhexane?

Accepted Answer

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

Question 13

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

Accepted Answer

A)   1:2:3:3:2:1
B)   1:3:6:6:3:1
C)   1:5:10:10:5:1
D)   1:6:15:15:6:1E) B) and C)
F) C) and D)

Question 14

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 C)
F) None of the above

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

Which of the protons in the following molecule appear at the highest δ-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)   ivE) B) and C)
F) None of the above

Question 17

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 18

Which of the following combinations of peaks appears in the 1H NMR spectrum of 1,4-dimethyoxyethane, CH3OCH2CH2CH2CH2OCH3?

Accepted Answer

A)   three singlets
B)   a singlet, a triplet, and a quintet
C)   a singlet and two triplets
D)   a doublet and a tripletE) A) and B)
F) B) and C)

Question 19

The following compound will have a 1H NMR spectrum that consists of:  two triplets and a singlet, area ratio 3:3:4.

Accepted Answer

A) True 
 B)False

Question 20

How many signals appear in the proton-decoupled 13C NMR spectrum of 1,4-dibromobenzene?

Accepted Answer

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

Exam 13: Nuclear Magnetic Resonance Spectroscopy

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.

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The following compound will have a 1H NMR spectrum that consists of: two triplets and a singlet, area ratio 3:3:4.

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

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

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

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

Correct Answerverifiedethyl acet...View AnswerShow Answer

Identify the physical factor that influences the coupling constant.

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

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

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Which of the following compounds would give a 1H NMR spectrum consisting of two singlets and a 13C NMR consisting of consisting of three signals?

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Which of the following combinations of peaks appears in the 1H NMR spectrum of 1,4-dimethyoxyethane, CH3OCH2CH2CH2CH2OCH3?

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Consider the compound shown below. The above compound would produce a signal further downfield in a 13C NMR spectrum than

Correct AnswerverifiedShow Answer

Identify the most appropriate intensity maintained for a pure ethanol NMR spectrum.

Correct AnswerverifiedShow Answer

Which C8H10 compound gives the following 1H NMR spectrum?

Correct AnswerverifiedShow Answer

How many sets of equivalent protons are there in 3-methylhexane?

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

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How many signals appear in the proton-decoupled 13C NMR spectrum of 1,4-dibromobenzene?

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

The following compound will have a ¹H NMR spectrum that consists of: two triplets and a singlet, area ratio 3:3:4.

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

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

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

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

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

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

Correct Answer
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Which of the following compounds would give a ¹H NMR spectrum consisting of two singlets and a ¹³C NMR consisting of consisting of three signals?

Correct Answer
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Which of the following combinations of peaks appears in the ¹H NMR spectrum of 1,4-dimethyoxyethane, CH₃OCH₂CH₂CH₂CH₂OCH₃?

Correct Answer
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Consider the compound shown below. The above compound would produce a signal further downfield in a ¹³C NMR spectrum than

Correct Answer
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Correct Answer
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Which C₈H₁₀ compound gives the following ¹H NMR spectrum?

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

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How many signals appear in the proton-decoupled ¹³C NMR spectrum of 1,4-dibromobenzene?

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