Question 1

Which of the following protons gives an NMR signal with the lowest chemical shift value (farthest upfield) ?

Accepted Answer

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

Question 2

How many proton NMR singlets will 2-bromo-3-methyl-2-butene exhibit?

Accepted Answer

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

Question 3

Deduce the identity of the following compound from the 1H NMR spectral data given.
C3H6Br2 : two peaks: a 2H quintet and a 4H triplet

Accepted Answer

Question 4

Which compound has a 1H NMR spectrum consisting of the following peaks: 0.9 (6H, d) , 1.0 (3H, t) , 2.2 (2H, q) , and 4.0 (1H, septet) ?

Accepted Answer

A)  (CH3) 2CHCH2O2CCH3
B)  (CH3) 2CHCH2CO2CH3
C)  (CH3) 2CHO2CCH2CH3
D)  (CH3) 2CHCO2CH2CH3
E)  (CH3) 2CHOCH2CH3

Question 5

Give the structure of a compound that has a formula of C8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (C) .

Accepted Answer

A)   8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (
C)  . 
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B)   8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (
C)  . 
A)     
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C)   8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (
C)  . 
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B)     
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D)   8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (
C)  . 
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E)   8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (
C)  . 
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E)    " class="answers-bank-image d-inline" rel="preload" >

Question 6

Give one reason why 13C NMR is less sensitive than 1H NMR.

Accepted Answer

Natural isotopic abundance of ...

Question 7

How many signals would you expect to see in the 1H NMR spectrum of the following compound? 1H NMR spectrum of the following compound?   A) 5 B) 4 C) 2 D) 3 E) 1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 8

Which of the following electromagnetic wave types is used in nuclear magnetic resonance spectroscopy?

Accepted Answer

A)  X-ray
B)  infrared
C)  visible
D)  radio
E)  ultraviolet

Question 9

Deduce the identity of the following compound from the spectral data given.
C5H10O: 1H NMR, δ 1.2 (6H, doublet), 2.1 (3H, singlet), 2.8 (1H, septet); IR, 2980, 1710 cm-1; MS, m/z 71,

Accepted Answer

Question 10

What information does a HETCOR spectrum give?

Accepted Answer

Coupling between hydrogens and the hydrogens to which they are attached to.

Question 11

If a chemical shift of an NMR signal is 7.2 ppm measured in a 60 MHz NMR spectrometer, how many Hz would this signal be from the TMS signal?

Accepted Answer

A)  8) 3 Hz
B)  432 Hz
C)  0) 12 Hz
D)  72 Hz
E)  60 Hz

Question 12

How many signals would you expect to see in the 1H NMR spectrum of the following compound? 1H NMR spectrum of the following compound?   A) 1 B) 2 C) 3 D) 4 E) 5" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 13

What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens?

Accepted Answer

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

Question 14

Why is Fourier transform NMR spectroscopy preferred over continuous wave as a technique for 13C NMR?

Accepted Answer

¹³C nuclei have a low sensitivity which re...

Question 15

What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? CH3OCH2CH2OCH3
↑

Accepted Answer

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

Question 16

How many signals would you expect to see in the 1H NMR spectrum of the following compound? ClCH2CH2Cl

Accepted Answer

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

Question 17

How many distinct carbon signals are expected in the proton-decoupled 13C NMR spectrum of the compound below?

Accepted Answer

Question 18

Deduce the identity of the following compound from the 1H NMR spectral data given.
C8H18O : δ 0.89 (6H, doublet), 1.87 (1H, multiplet), 3.17 (2H, doublet)(ppm)

Accepted Answer

Question 19

An unknown compound, C4H8Br2, gave the following proton NMR data:
Singlet at 1.97 ppm (6H)
Singlet at 3.89 ppm (2H)
What is the compound?

Accepted Answer

Question 20

Give the structure of a compound that has a formula of C9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (C) ; 132.8 ppm (CH) ; and167.0 ppm (C) .

Accepted Answer

A)   9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (
C)  ; 132.8 ppm (CH) ; and167.0 ppm (
C)  . 
A)     
B)     
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D)     
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B)   9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (
C)  ; 132.8 ppm (CH) ; and167.0 ppm (
C)  . 
A)     
B)     
C)     
D)     
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C)   9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (
C)  ; 132.8 ppm (CH) ; and167.0 ppm (
C)  . 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (
C)  ; 132.8 ppm (CH) ; and167.0 ppm (
C)  . 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (
C)  ; 132.8 ppm (CH) ; and167.0 ppm (
C)  . 
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Exam 15: Nmr Spectroscopy

Which of the following protons gives an NMR signal with the lowest chemical shift value (farthest upfield) ?

Correct AnswerverifiedShow Answer

How many proton NMR singlets will 2-bromo-3-methyl-2-butene exhibit?

Correct AnswerverifiedShow Answer

Deduce the identity of the following compound from the 1H NMR spectral data given. C3H6Br2 : two peaks: a 2H quintet and a 4H triplet

Correct AnswerverifiedShow Answer

Which compound has a 1H NMR spectrum consisting of the following peaks: 0.9 (6H, d) , 1.0 (3H, t) , 2.2 (2H, q) , and 4.0 (1H, septet) ?

Correct AnswerverifiedShow Answer

Give the structure of a compound that has a formula of C8H11N and has signals in the 13C NMR spectrum at 25.9 ppm (CH3) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (C) .

Correct AnswerverifiedShow Answer

Give one reason why 13C NMR is less sensitive than 1H NMR.

Correct AnswerverifiedNatural isotopic abundance of ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following electromagnetic wave types is used in nuclear magnetic resonance spectroscopy?

Correct AnswerverifiedShow Answer

Deduce the identity of the following compound from the spectral data given. C5H10O: 1H NMR, δ 1.2 (6H, doublet), 2.1 (3H, singlet), 2.8 (1H, septet); IR, 2980, 1710 cm-1; MS, m/z 71,

Correct AnswerverifiedShow Answer

What information does a HETCOR spectrum give?

Correct AnswerverifiedCoupling between hydrogens and the hydrogens to which they are attached to.

If a chemical shift of an NMR signal is 7.2 ppm measured in a 60 MHz NMR spectrometer, how many Hz would this signal be from the TMS signal?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens?

Correct AnswerverifiedA

Why is Fourier transform NMR spectroscopy preferred over continuous wave as a technique for 13C NMR?

Correct Answerverified13C nuclei have a low sensitivity which re...View AnswerShow Answer

What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? CH3OCH2CH2OCH3 ↑

Correct AnswerverifiedA

How many signals would you expect to see in the 1H NMR spectrum of the following compound? ClCH2CH2Cl

Correct AnswerverifiedShow Answer

How many distinct carbon signals are expected in the proton-decoupled 13C NMR spectrum of the compound below?

Correct AnswerverifiedShow Answer

Deduce the identity of the following compound from the 1H NMR spectral data given. C8H18O : δ 0.89 (6H, doublet), 1.87 (1H, multiplet), 3.17 (2H, doublet)(ppm)

Correct AnswerverifiedShow Answer

An unknown compound, C4H8Br2, gave the following proton NMR data: Singlet at 1.97 ppm (6H) Singlet at 3.89 ppm (2H) What is the compound?

Correct AnswerverifiedShow Answer

Give the structure of a compound that has a formula of C9H10O2 and has signals in the 13C NMR spectrum at 13.6 ppm (CH3) ; 59.1 ppm (CH2) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (C) ; 132.8 ppm (CH) ; and167.0 ppm (C) .

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Deduce the identity of the following compound from the ¹H NMR spectral data given. C₃H₆Br₂: two peaks: a 2H quintet and a 4H triplet

Correct Answer
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Which compound has a ¹H NMR spectrum consisting of the following peaks: 0.9 (6H, d) , 1.0 (3H, t) , 2.2 (2H, q) , and 4.0 (1H, septet) ?

Correct Answer
verified

Give the structure of a compound that has a formula of C₈H₁₁N and has signals in the ¹³C NMR spectrum at 25.9 ppm (CH₃) , 51.1 ppm (CH) , 125.9 ppm (CH) , 126.6 ppm (CH) , 128.3 ppm (CH) , and 148.5 ppm (C) .

Correct Answer
verified

Give one reason why ¹³C NMR is less sensitive than ¹H NMR.

Correct Answer
verified
Natural isotopic abundance of ...
View Answer

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

Correct Answer
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Correct Answer
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Deduce the identity of the following compound from the spectral data given. C₅H₁₀O: ¹H NMR, δ 1.2 (6H, doublet), 2.1 (3H, singlet), 2.8 (1H, septet); IR, 2980, 1710 cm^-1; MS, m/z 71,

Correct Answer
verified

Correct Answer
verified
Coupling between hydrogens and the hydrogens to which they are attached to.

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
A

Why is Fourier transform NMR spectroscopy preferred over continuous wave as a technique for ¹³C NMR?

Correct Answer
verified
¹³C nuclei have a low sensitivity which re...
View Answer

What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? CH₃OCH₂CH₂OCH₃ ↑

Correct Answer
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A

How many signals would you expect to see in the ¹H NMR spectrum of the following compound? ClCH₂CH₂Cl

Correct Answer
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How many distinct carbon signals are expected in the proton-decoupled ¹³C NMR spectrum of the compound below?

Correct Answer
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Deduce the identity of the following compound from the ¹H NMR spectral data given. C₈H₁₈O : δ 0.89 (6H, doublet), 1.87 (1H, multiplet), 3.17 (2H, doublet)(ppm)

Correct Answer
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An unknown compound, C₄H₈Br₂, gave the following proton NMR data: Singlet at 1.97 ppm (6H) Singlet at 3.89 ppm (2H) What is the compound?

Correct Answer
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Give the structure of a compound that has a formula of C₉H₁₀O₂ and has signals in the ¹³C NMR spectrum at 13.6 ppm (CH₃) ; 59.1 ppm (CH₂) ; 128.4 ppm (CH) ; 129.7 ppm (CH) ; 130.5 ppm (C) ; 132.8 ppm (CH) ; and167.0 ppm (C) .

Correct Answer
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