Question 1

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

Accepted Answer

A) CH3CH(OCH3)2 
B) CH3OCH2CH2CH2CH2OCH3 
C) CH3OCH2CH2OCH3 
D) CH3OCH2CH(OH)CH3 
A) CH3CH(OCH3)2 
B) CH3OCH2CH2CH2CH2OCH3 
C) CH3OCH2CH2OCH3 
D) CH3OCH2CH(OH)CH3 B

Question 2

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

Accepted Answer

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

Question 3

MATCHING
The following questions pertain to the display of NMR spectra. Match a term to each description below.
-NMR spectrum are calibrated using an arbitrary scale that is divided into _____ units.

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 D

Question 4

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

Accepted Answer

p-xylene (

Question 5

Identify the compound (C3H7Cl) that gives the following 1H NMR spectrum.

Accepted Answer

Question 6

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

Accepted Answer

ethyl acet

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left.  
-_____The number of nonequivalent hydrogen atoms in this compound.

Accepted Answer

The answer of Consider the following structure. Answer the following...

Question 9

Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?

Accepted Answer

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

Question 10

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 11

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 12

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 13

Which of the protons in the following molecule appear at the highest $\delta$-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 14

Which of the following compounds have homotopic protons?
1)propane
2)butane
3)2-methylpropane

Accepted Answer

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

Question 15

MATCHING
The following questions pertain to the display of NMR spectra. Match a term to each description below.
-The calibration standard for 1H and 13C NMR is _____.

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 16

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 17

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 18

Which C9H10O 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 19

Identify the compound (C4H8O) that gives the following 1H NMR spectrum.

Accepted Answer

Question 20

All of the following compound produce only singlets in a 1H NMR spectrum.

Accepted Answer

A) True 
 B)False

Exam 13: Nuclear Magnetic Resonance Spectroscopy

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

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

MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -NMR spectrum are calibrated using an arbitrary scale that is divided into _____ units.

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

Identify the compound (C3H7Cl) that gives the following 1H NMR spectrum.

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

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

Consider the following structure. Answer the following questions by placing the appropriate number in the blank to the left. -_____The number of nonequivalent hydrogen atoms in this compound.

Which C4H9Br compound gives a doublet at approximately 3.3 ppm in the 1H NMR spectrum?

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. -_______

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. -_______

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

Which of the following compounds have homotopic protons? 1)propane 2)butane 3)2-methylpropane

MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -The calibration standard for 1H and 13C NMR is _____.

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. -_______

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

Which C9H10O compound gives the following 1H NMR spectrum?

Identify the compound (C4H8O) that gives the following 1H NMR spectrum.

All of the following compound produce only singlets in a 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

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

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

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

Identify the compound (C₃H₇Cl) that gives the following ¹H NMR spectrum.

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

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

Which C₄H₉Br compound gives a doublet at approximately 3.3 ppm in the ¹H NMR spectrum?

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. -_______

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. -_______

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 protons in the following molecule appear at the highest $\delta$ -value in the ¹H NMR spectrum? $Which of the protons in the following molecule appear at the highest \delta -value in the <sup>1</sup>H NMR spectrum?$

MATCHING The following questions pertain to the display of NMR spectra. Match a term to each description below. -The calibration standard for ¹H and ¹³C NMR is _____.

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. -_______

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

Which C₉H₁₀O compound gives the following ¹H NMR spectrum?

Identify the compound (C₄H₈O) that gives the following ¹H NMR spectrum.

All of the following compound produce only singlets in a ¹H NMR spectrum.