Question 1

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

Question 2

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 3

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?

Accepted Answer

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

Question 4

Identify the physical factor that influences the coupling constant.

Accepted Answer

A)  Hybridization 
B)  Cryomagnetic ratio 
C)  Chemical exchange 
D)  Karplus empirical formula 
A)  Hybridization 
B)  Cryomagnetic ratio 
C)  Chemical exchange 
D)  Karplus empirical formula

Question 5

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

Accepted Answer

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

Question 6

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 7

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 8

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 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

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 11

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

Accepted Answer

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

Question 12

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Accepted Answer

ethyl acet

Question 16

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

Accepted Answer

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

Question 17

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

Question 18

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

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

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)  6:3:1 
A)  1:2:3 
B)  5:1 
C)  4:3:2 
D)  6:3:1

Exam 13: Nuclear Magnetic Resonance Spectroscopy

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

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.

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?

Identify the physical factor that influences the coupling constant.

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

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

Which C8H10 compound gives the following 1H NMR spectrum?

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

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

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

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

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

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

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

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

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

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

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

Identify the most appropriate intensity maintained for a pure ethanol 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

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

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.

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?

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

Which C₈H₁₀ compound gives the following ¹H NMR spectrum?

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

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

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

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

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

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

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

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

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

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

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