Question 1

How many signals would you expect in the 1H NMR spectrum of the following compound?

Accepted Answer

Question 2

Presence of which of the following protons is confirmed by D2O exchange?

Accepted Answer

A)  OH 
B)  NH2 
C)  CH 
D)  A & B 
E)  none of these 
A)  OH 
B)  NH2 
C)  CH 
D)  A & B 
E)  none of these

Question 3

Which of the following compounds, with molecular formula C9H18O2, is consistent with the 1H NMR and 13C NMR spectra shown below? SHAPE \* MERGEFORMAT

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  None of these 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  None of these

Question 4

A compound, with molecular formula C4H9Br, displays the following 1H NMR and 13C NMR spectra. Propose a structure for this compound.

Accepted Answer

Question 5

Which of the following compounds will display only three singlets in its 1H NMR spectrum?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 6

Draw a structure, with a formula of C5H13N, which has an integration of 9H, 3H, 1H.

Accepted Answer

Question 7

Which of the following compounds is consistent with the 13C NMR spectrum shown below?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 8

How many signals would you expect in the 1H NMR spectrum of HOCH2CH2CH2CH2OH?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 9

The 1H NMR spectrum of bromoethane shows a signal at 3.5 ppm when the spectrum is recorded using a 60 MHz spectrometer. Where do you expect to see the signal if a 300 MHz instrument is used instead?

Accepted Answer

A)  3.5 ppm 
B)  7.5 ppm 
C)  6.8 ppm 
D)  5.8 ppm 
E)  none of these 
A)  3.5 ppm 
B)  7.5 ppm 
C)  6.8 ppm 
D)  5.8 ppm 
E)  none of these

Question 10

NMR is an abbreviation for ____________ ____________ __________.

Accepted Answer

nuclear ma

Question 11

The off-resonance decoupling in 13C NMR allows for ________ splitting.

Accepted Answer

A)  (12C-13
C)  
B)  (12C-1H) 
C)  (13C-13
C)  
D)  (13C-1H) 
E)  none of these 
A)  (12C-13
C)  
B)  (12C-1H) 
C)  (13C-13
C)  
D)  (13C-1H) 
E)  none of these

Question 12

Which of the following is true about the number of signals in a 1H NMR spectrum?

Accepted Answer

A)  it indicates the number of neighboring protons 
B)  it indicates the electronic environment of neighboring protons 
C)  it indicates the number of different kinds of protons 
D)  it indicates the electronic environment of absorbing protons 
E)  it indicates the number of protons in the signal 
A)  it indicates the number of neighboring protons 
B)  it indicates the electronic environment of neighboring protons 
C)  it indicates the number of different kinds of protons 
D)  it indicates the electronic environment of absorbing protons 
E)  it indicates the number of protons in the signal

Question 13

Which of the following compounds will display four signals in its 13C NMR spectrum?

Accepted Answer

A)  2,6-dimethylheptane 
B)  2,4-dimethylheptane 
C)  3,5-dimethylheptane 
D)  4,4-dimethylheptane 
E)  3,4-dimethylheptane 
A)  2,6-dimethylheptane 
B)  2,4-dimethylheptane 
C)  3,5-dimethylheptane 
D)  4,4-dimethylheptane 
E)  3,4-dimethylheptane

Question 14

Determine the multiplicity and predict the chemical shifts of each signal in the expected 1H NMR spectrum of the following compound.

Accepted Answer

Question 15

Predict the chemical shifts for the signals in the 1H NMR spectrum for the following compound.

Accepted Answer

Question 16

Which of the indicated protons in the following compound would appear most upfield in the 1H NMR spectrum?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  I & III 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  I & III

Question 17

Which of the following carbon atoms will display the signal most downfield in the 13C NMR spectrum?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 18

Which of the following is not a common solvent used for acquiring a 1H NMR spectrum?

Accepted Answer

A)  CDCl3 
B)  CCl4 
C)  CD3CN 
D)  CH3OH 
E)  D2O 
A)  CDCl3 
B)  CCl4 
C)  CD3CN 
D)  CH3OH 
E)  D2O

Question 19

List the most common nuclei that are used in NMR.

Accepted Answer

The answer of List the most common nuclei that are...

Question 20

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

Accepted Answer

A)  1,1-dichloropropane 
B)  1,3-dichloropropane 
C)  1,2-dichloropropane 
D)  2,2-dichloropropane 
E)  1-chloropropane 
A)  1,1-dichloropropane 
B)  1,3-dichloropropane 
C)  1,2-dichloropropane 
D)  2,2-dichloropropane 
E)  1-chloropropane

Exam 15: Nuclear Magnetic Resonance Spectroscopy

How many signals would you expect in the 1H NMR spectrum of the following compound?

Presence of which of the following protons is confirmed by D2O exchange?

Which of the following compounds, with molecular formula C9H18O2, is consistent with the 1H NMR and 13C NMR spectra shown below? SHAPE \* MERGEFORMAT

A compound, with molecular formula C4H9Br, displays the following 1H NMR and 13C NMR spectra. Propose a structure for this compound.

Which of the following compounds will display only three singlets in its 1H NMR spectrum?

Draw a structure, with a formula of C5H13N, which has an integration of 9H, 3H, 1H.

Which of the following compounds is consistent with the 13C NMR spectrum shown below?

How many signals would you expect in the 1H NMR spectrum of HOCH2CH2CH2CH2OH?

The 1H NMR spectrum of bromoethane shows a signal at 3.5 ppm when the spectrum is recorded using a 60 MHz spectrometer. Where do you expect to see the signal if a 300 MHz instrument is used instead?

NMR is an abbreviation for ____________ ____________ __________.

The off-resonance decoupling in 13C NMR allows for ________ splitting.

Which of the following is true about the number of signals in a 1H NMR spectrum?

Which of the following compounds will display four signals in its 13C NMR spectrum?

Determine the multiplicity and predict the chemical shifts of each signal in the expected 1H NMR spectrum of the following compound.

Predict the chemical shifts for the signals in the 1H NMR spectrum for the following compound.

Which of the indicated protons in the following compound would appear most upfield in the 1H NMR spectrum?

Which of the following carbon atoms will display the signal most downfield in the 13C NMR spectrum?

Which of the following is not a common solvent used for acquiring a 1H NMR spectrum?

List the most common nuclei that are used in NMR.

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

A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Chemical Reactivity and Mechanisms

Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Conjugated Pi Systems and Pericyclic Reactions

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Introduction to Organometallic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

How many signals would you expect in the ¹H NMR spectrum of the following compound?

Presence of which of the following protons is confirmed by D₂O exchange?

A compound, with molecular formula C₄H₉Br, displays the following ¹H NMR and ¹³C NMR spectra. Propose a structure for this compound.

Which of the following compounds will display only three singlets in its ¹H NMR spectrum?

Draw a structure, with a formula of C₅H₁₃N, which has an integration of 9H, 3H, 1H.

Which of the following compounds is consistent with the ¹³C NMR spectrum shown below?

How many signals would you expect in the ¹H NMR spectrum of HOCH₂CH₂CH₂CH₂OH?

The ¹H NMR spectrum of bromoethane shows a signal at 3.5 ppm when the spectrum is recorded using a 60 MHz spectrometer. Where do you expect to see the signal if a 300 MHz instrument is used instead?

NMR is an abbreviation for __ .

The off-resonance decoupling in ¹³C NMR allows for ________ splitting.

Which of the following is true about the number of signals in a ¹H NMR spectrum?

Which of the following compounds will display four signals in its ¹³C NMR spectrum?

Determine the multiplicity and predict the chemical shifts of each signal in the expected ¹H NMR spectrum of the following compound.

Predict the chemical shifts for the signals in the ¹H NMR spectrum for the following compound.

Which of the indicated protons in the following compound would appear most upfield in the ¹H NMR spectrum?

Which of the following carbon atoms will display the signal most downfield in the ¹³C NMR spectrum?

Which of the following is not a common solvent used for acquiring a ¹H NMR spectrum?

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