Question 1

Predict the splitting patterns you would expect for each proton in the molecules below:
-Predict:

Accepted Answer

The answer of Predict the splitting patterns you would expect...

Question 2

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled S1U1P113S1S1P0C NMR spectra.
-Number of signals:

Accepted Answer

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

Question 3

Answer the following question(s) for the compound whose S1U1P11S1S1P0H NMR spectra is shown below.
CS1U1B14S1U1B0HS1U1B18S1U1B0O  (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/)
-Refer to instructions. Describe each signal in terms of its integration, splitting and chemical shift.

Accepted Answer

The signals at 1.05 and 2.45 δ are chara...

Question 4

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) A) and B)
F) None of the above

Question 5

Refer to the structure of 3-methylbutan-2-one below to answer the following question(s) . 
-Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

Accepted Answer

A)   singlet, singlet, singlet
B)   singlet, septet, quartet
C)   singlet, septet, doublet
D)   singlet, septet, doublet, doubletE) A) and B)
F) A) and C)

Question 6

How many sets of equivalent protons are there in hexane, 2-methylhexane, and 3-methylhexane, respectively?

Accepted Answer

The answer of How many sets of equivalent protons are...

Question 7

How many signals appear in the broadband-decoupled 13C NMR spectrum of 1,3-dibromobenzene?

Accepted Answer

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

Question 8

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

Question 9

Answer the following question(s) for the compound whose S1U1P11S1S1P0H NMR spectra is shown below.
CS1U1B14S1U1B0HS1U1B18S1U1B0O  (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/)
-Refer to instructions. Propose a structure for this compound.

Accepted Answer

butan-2-on...

Question 10

The following questions pertain to the display of NMR spectra. Match a term to each description below.
-The vertical axis of spectrum displays the _____ of the signal.

Accepted Answer

A)  TMS
B)  high-field or upfield side
C)  MHz
D)  delta (δ) 
E)  low-field or downfield sideF) chemical shiftG) intensityH) B) and E)
I) E) and G)

Question 11

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) 
E)  low-field or downfield sideF) chemical shiftG) intensityH) A) and E)
I) E) and F)

Question 12

Nuclear magnetic resonance spectroscopy provides information about a molecule's:

Accepted Answer

A)   conjugated pi electron system.
B)   size and formula.
C)   carbon-hydrogen framework.
D)   functional groups.E) All of the above
F) A) and C)

Question 13

Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). 
-A compound with the molecular formula C5H12O produces only two singlets in the 1H NMR spectrum.
a)Propose a structure for this compound.
b)How many signals would be present in the 13C NMR for this structure?

Accepted Answer

Question 14

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled S1U1P113S1S1P0C NMR spectra.
-Arrange the following compounds in order of increasing number of signals in a 13C NMR spectrum.

Accepted Answer

Question 15

Which of the following combinations of peaks appears in the 1H NMR spectrum of 2-methylpropane?

Accepted Answer

A)   two singlets
B)   a singlet and a nonet
C)   a singlet and a decet
D)   a doublet and a decetE) A) and D)
F) B) and D)

Question 16

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled S1U1P113S1S1P0C NMR spectra.
-Number of signals:

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

Predict the splitting patterns you would expect for each proton in the molecules below:
-Predict:

Accepted Answer

The answer of Predict the splitting patterns you would expect...

Question 19

How many positive and negative peaks appear in the DEPT-135 spectrum of 2,4-dimethylpentane?

Accepted Answer

A)   two positive and one negative
B)   three positive and two negative
C)   four positive and three negative
D)   six positive and one negativeE) C) and D)
F) B) and D)

Question 20

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra.
-Which of the following would produce only singlets in an 1H NMR spectrum? A 13C NMR spectra. -Which of the following would produce only singlets in an 1H NMR spectrum? A   B   C   D   ​ A)  A B)  B C)  C D)  D E)  all of these produce only singlets" class="answers-bank-image d-inline" rel="preload" > B 13C NMR spectra. -Which of the following would produce only singlets in an 1H NMR spectrum? A   B   C   D   ​ A)  A B)  B C)  C D)  D E)  all of these produce only singlets" class="answers-bank-image d-inline" rel="preload" > C 13C NMR spectra. -Which of the following would produce only singlets in an 1H NMR spectrum? A   B   C   D   ​ A)  A B)  B C)  C D)  D E)  all of these produce only singlets" class="answers-bank-image d-inline" rel="preload" > D 13C NMR spectra. -Which of the following would produce only singlets in an 1H NMR spectrum? A   B   C   D   ​ A)  A B)  B C)  C D)  D E)  all of these produce only singlets" class="answers-bank-image d-inline" rel="preload" > ​

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   all of these produce only singletsF) A) and B)
G) All of the above

Exam 11: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled ¹³C NMR spectra. -Which of the following would produce only singlets in an ¹H NMR spectrum? A B C D

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 decoupled ¹³C NMR spectra. -Number of signals:

Correct Answer
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How many positive and negative peaks appear in the DEPT-135 spectrum of 2,4-dimethylpentane?

Correct Answer
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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 _____.

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

Correct Answer
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Answer the following question(s) for the compound whose ¹H NMR spectra is shown below. C₄H₈O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Propose a structure for this compound.

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

Correct Answer
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How many sets of equivalent protons are there in hexane, 2-methylhexane, and 3-methylhexane, respectively?

Correct Answer
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The following questions pertain to the display of NMR spectra. Match a term to each description below. -The vertical axis of spectrum displays the _____ of the signal.

Correct Answer
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How many signals appear in the broadband-decoupled ¹³C NMR spectrum of 1,3-dibromobenzene?

Correct Answer
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Predict the splitting patterns you would expect for each proton in the molecules below: -Predict:

Correct Answer
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Refer to the structure of 3-methylbutan-2-one below to answer the following question(s) . -Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

Correct Answer
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Which of the following combinations of peaks appears in the ¹H NMR spectrum of 2-methylpropane?

Correct Answer
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Predict the splitting patterns you would expect for each proton in the molecules below: -Predict:

Correct Answer
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Nuclear magnetic resonance spectroscopy provides information about a molecule's:

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 decoupled ¹³C NMR spectra. -Number of signals:

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

Correct Answer
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Answer the following question(s) for the compound whose ¹H NMR spectra is shown below. C₄H₈O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Describe each signal in terms of its integration, splitting and chemical shift.

Correct Answer
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The signals at 1.05 and 2.45 δ are chara...
View Answer

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 decoupled ¹³C NMR spectra. -Arrange the following compounds in order of increasing number of signals in a ¹³C NMR spectrum.

Correct Answer
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Exam 11: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. -Which of the following would produce only singlets in an 1H NMR spectrum? A B C D ​

Correct AnswerverifiedShow Answer

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. -Number of signals:

Correct AnswerverifiedShow Answer

How many positive and negative peaks appear in the DEPT-135 spectrum of 2,4-dimethylpentane?

Correct AnswerverifiedShow Answer

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 _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Answer the following question(s) for the compound whose 1H NMR spectra is shown below. C4H8O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Propose a structure for this compound.

Correct Answerverifiedbutan-2-on...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

How many sets of equivalent protons are there in hexane, 2-methylhexane, and 3-methylhexane, respectively?

Correct AnswerverifiedShow Answer

The following questions pertain to the display of NMR spectra. Match a term to each description below. -The vertical axis of spectrum displays the _____ of the signal.

Correct AnswerverifiedShow Answer

How many signals appear in the broadband-decoupled 13C NMR spectrum of 1,3-dibromobenzene?

Correct AnswerverifiedShow Answer

Predict the splitting patterns you would expect for each proton in the molecules below: -Predict:

Correct AnswerverifiedShow Answer

Refer to the structure of 3-methylbutan-2-one below to answer the following question(s) . -Refer to instructions. What is the splitting pattern for the hydrogens in 3-methylbutan-2-one labeled A, B, and C, respectively?

Correct AnswerverifiedShow Answer

Which of the following combinations of peaks appears in the 1H NMR spectrum of 2-methylpropane?

Correct AnswerverifiedShow Answer

Predict the splitting patterns you would expect for each proton in the molecules below: -Predict:

Correct AnswerverifiedShow Answer

Nuclear magnetic resonance spectroscopy provides information about a molecule's:

Correct AnswerverifiedShow Answer

For each of the compounds below tell how many signals you would expect the molecule to have in its normal, broadband decoupled 13C NMR spectra. -Number of signals:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Answer the following question(s) for the compound whose 1H NMR spectra is shown below. C4H8O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Describe each signal in terms of its integration, splitting and chemical shift.

Correct AnswerverifiedThe signals at 1.05 and 2.45 δ are chara...View AnswerShow Answer

Refer to the structure of 3-methylbutan-2-one below to answer the following question(s). -A compound with the molecular formula C5H12O produces only two singlets in the 1H NMR spectrum. a)Propose a structure for this compound. b)How many signals would be present in the 13C NMR for this structure?

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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 decoupled 13C NMR spectra. -Arrange the following compounds in order of increasing number of signals in a 13C NMR spectrum.

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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 decoupled ¹³C NMR spectra. -Which of the following would produce only singlets in an ¹H NMR spectrum? A B C D

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 decoupled ¹³C NMR spectra. -Number of signals:

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

Correct Answer
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Answer the following question(s) for the compound whose ¹H NMR spectra is shown below. C₄H₈O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Propose a structure for this compound.

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

Correct Answer
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Correct Answer
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Correct Answer
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How many signals appear in the broadband-decoupled ¹³C NMR spectrum of 1,3-dibromobenzene?

Correct Answer
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Correct Answer
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Correct Answer
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Which of the following combinations of peaks appears in the ¹H NMR spectrum of 2-methylpropane?

Correct Answer
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Correct Answer
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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 decoupled ¹³C NMR spectra. -Number of signals:

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

Correct Answer
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Answer the following question(s) for the compound whose ¹H NMR spectra is shown below. C₄H₈O (Spectrum obtained from: SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/) -Refer to instructions. Describe each signal in terms of its integration, splitting and chemical shift.

Correct Answer
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The signals at 1.05 and 2.45 δ are chara...
View Answer

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 decoupled ¹³C NMR spectra. -Arrange the following compounds in order of increasing number of signals in a ¹³C NMR spectrum.

Correct Answer
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