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) 7 
A) 3 
B) 4 
C) 5 
D) 7

Question 2

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

Question 3

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

Question 5

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 6

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

Question 7

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

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
A) 3 
B) 4 
C) 5 
D) 6

Question 8

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 9

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

Question 10

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-dibromopropane 
A) 1,1-dibromopropane 
B) 1,2-dibromopropane 
C) 1,3-dibromopropane 
D) 2,2-dibromopropane

Question 11

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

Accepted Answer

m-xylene (

Question 12

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

Question 13

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

Question 14

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

Accepted Answer

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

Question 15

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 16

Which C8H10 compound gives the following 1H NMR spectrum?

Accepted Answer

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

Question 17

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 ($\delta$) 
E) low-field or downfield side
F)chemical shift
G)intensity 
A) TMS 
B) high-field or upfield side 
C) MHz 
D) delta ($\delta$) 
E) low-field or downfield side
F)chemical shift
G)intensity

Question 18

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

Accepted Answer

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

Question 19

Which C6H12O2 compound gives the following 1H NMR spectrum?

Accepted Answer

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

Question 20

Which C8H10 compound gives the following 1H NMR spectrum?

Accepted Answer

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

Exam 13: Nuclear Magnetic Resonance Spectroscopy

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

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

How many sets of equivalent protons are there in hexane?

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

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

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

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

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

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

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

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

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

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

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

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

Which C8H10 compound gives the following 1H NMR spectrum?

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 _____.

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

Which C6H12O2 compound gives the following 1H NMR spectrum?

Which C8H10 compound gives the following 1H NMR spectrum?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Which C₈H₁₀ compound gives the following ¹H NMR spectrum?

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

Which C₆H₁₂O₂ compound gives the following ¹H NMR spectrum?

Which C₈H₁₀ compound gives the following ¹H NMR spectrum?