Question 1

How many sets of equivalent protons are there in hexane?

Accepted Answer

A)  2 
B)  3 
C)  6 
D)  7 
A)  2 
B)  3 
C)  6 
D)  7

Question 2

Which of the protons in the following molecule appear at the highest ?-value in the 1H NMR spectrum? $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$O
$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$||
$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{C}-\mathrm{CH}_{3}$
$\quad$i$\quad$$\quad$$\quad$ ii$\quad$$\quad$ iii$\quad$$\quad$$\quad$ iv

Accepted Answer

A)  i 
B)  ii 
C)  iii 
D)  iv 
A)  i 
B)  ii 
C)  iii 
D)  iv

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

Identify the compound (C8H10O2) that gives the following 1H NMR spectrum.

Accepted Answer

3-phenylpr

Question 5

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)  quartet 
A)  singlet 
B)  doublet 
C)  triplet 
D)  quartet

Question 6

Which feature in the 1H NMR spectrum provides information about the relative number of each type of proton in a compound?

Accepted Answer

A)  number of signals 
B)  integral 
C)  splitting 
D)  chemical shift 
A)  number of signals 
B)  integral 
C)  splitting 
D)  chemical shift

Question 7

Which feature in the 1H NMR spectrum provides information about the number of types of different protons in a compound?

Accepted Answer

A)  number of signals 
B)  integral 
C)  splitting 
D)  chemical shift 
A)  number of signals 
B)  integral 
C)  splitting 
D)  chemical shift

Question 8

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

Accepted Answer

A)  i 
B)  ii 
C)  iii 
D)  iv 
A)  i 
B)  ii 
C)  iii 
D)  iv

Question 9

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

Accepted Answer

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

Question 10

What is the appearance of the signal corresponding to the CH2 protons in the 1H NMR spectrum of ethyl methyl ether, CH3CH2OCH3?

Accepted Answer

A)  a doublet 
B)  a triplet 
C)  a quartet 
D)  a septet 
A)  a doublet 
B)  a triplet 
C)  a quartet 
D)  a septet

Question 11

How many sets of equivalent protons are there in 2-methylhexane?

Accepted Answer

A)  2 
B)  3 
C)  6 
D)  7 
A)  2 
B)  3 
C)  6 
D)  7

Question 12

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)  1:6:15:20:15:6:1 
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)  1:6:15:20:15:6:1

Question 13

Identify the ratio of peak areas upon integration of the 1H NMR spectrum for A, B, and C respectively. Enter the numbers separated by colons.

Accepted Answer

Question 14

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

Accepted Answer

A)  only i 
B)  only iii 
C)  only ii and iii 
D)  only ii, iii and iv 
A)  only i 
B)  only iii 
C)  only ii and iii 
D)  only ii, iii and iv

Question 15

Identify the compound (C8H11N) that gives the following 1H NMR spectrum.

Accepted Answer

1-phenylet

Question 16

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound?

Accepted Answer

A)  6 
B)  7 
C)  8 
D)  11 
A)  6 
B)  7 
C)  8 
D)  11

Question 17

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of 1-bromo-2-methylpropane?

Accepted Answer

A)  singlet 
B)  doublet 
C)  triplet 
D)  nonet 
A)  singlet 
B)  doublet 
C)  triplet 
D)  nonet

Question 18

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

Question 19

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

Accepted Answer

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

Question 20

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound?

Accepted Answer

A)  7 
B)  8 
C)  9 
D)  11 
A)  7 
B)  8 
C)  9 
D)  11

Exam 13: Nuclear Magnetic Resonance Spectroscopy

How many sets of equivalent protons are there in hexane?

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. -_______

Identify the compound (C8H10O2) that gives the following 1H NMR spectrum.

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

Which feature in the 1H NMR spectrum provides information about the relative number of each type of proton in a compound?

Which feature in the 1H NMR spectrum provides information about the number of types of different protons in a compound?

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

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

What is the appearance of the signal corresponding to the CH2 protons in the 1H NMR spectrum of ethyl methyl ether, CH3CH2OCH3?

How many sets of equivalent protons are there in 2-methylhexane?

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

Identify the ratio of peak areas upon integration of the 1H NMR spectrum for A, B, and C respectively. Enter the numbers separated by colons.

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

Identify the compound (C8H11N) that gives the following 1H NMR spectrum.

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound?

What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of 1-bromo-2-methylpropane?

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

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

How many signals appear in the proton-decoupled 13C NMR spectrum of the following compound?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

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. -_______

Identify the compound (C₈H₁₀O₂) that gives the following ¹H NMR spectrum.

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

Which feature in the ¹H NMR spectrum provides information about the relative number of each type of proton in a compound?

Which feature in the ¹H NMR spectrum provides information about the number of types of different protons in a compound?

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

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

What is the appearance of the signal corresponding to the CH₂ protons in the ¹H NMR spectrum of ethyl methyl ether, CH₃CH₂OCH₃?

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

Identify the ratio of peak areas upon integration of the ¹H NMR spectrum for A, B, and C respectively. Enter the numbers separated by colons.

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

Identify the compound (C₈H₁₁N) that gives the following ¹H NMR spectrum.

How many signals appear in the proton-decoupled ¹³C NMR spectrum of the following compound?

What is the splitting of the signal in the ¹H NMR spectrum for the methyl protons of 1-bromo-2-methylpropane?

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

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

How many signals appear in the proton-decoupled ¹³C NMR spectrum of the following compound?