Question 1

How many distinct triplets would you expect in the 1H NMR of the compound below? 1H NMR of the compound below?   A) 0 B) 2 C) 4 D) 6 E) 8" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0
B)  2
C)  4
D)  6
E)  8F) A) and E)
G) All of the above

Question 2

Provide the structure that is consistent with the data below.
C6H11N
IR (cm-1): 2950,2230
1H NMR (δ): 1.7 (quintet,1H),1.2 (m,4H),0.9 (t,6H)
13C NMR (δ): 95 (s),45 (d),25 (t),18 (q)

Accepted Answer

Question 3

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)  5F) B) and C)
G) B) and E)

Question 4

What is indicated by a cross peak in the COSY spectrum of a compound?

Accepted Answer

The dots that are not on the d...

Question 5

Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of CH3CH2OCH3.

Accepted Answer

3 signals: (3H,tripl...

Question 6

Deduce the identity of the following compound from the 1H NMR spectral data given.
C7H12O4 : δ 1.1 (6H,triplet),3.4 (2H,singlet),4.2 (4H,quartet)(ppm)

Accepted Answer

Question 7

How many signals will be observed in the proton NMR spectrum of the following molecule?

Accepted Answer

A)  4
B)  5
C)  6
D)  7
E)  8F) A) and B)
G) B) and E)

Question 8

Can alkenes and aromatics be easily distinguished from each other in an 13C NMR spectrum?

Accepted Answer

Alkenes are in the range of 10...

Question 9

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

Accepted Answer

Question 10

Give the structure for the compound that has a formula of C11H16O and the following 1H NMR and 13C NMR spectra.Label the hydrogens and the carbons.
1H NMR spectrum: 1.3 ppm,(d,6H); 3.1 ppm (sept,1H); 3.2 ppm (s,3H); 4.6 ppm (s,2H),7.1 ppm (d,2H),7.1 ppm (d,2H)
13C NMR spectrum: 24.4 ppm (CH3); 31.7 ppm (CH); 53.5 ppm (CH3); 77.9 ppm (CH2); 126.2 ppm (CH); 127.3 ppm (CH); 134.4 ppm (C); and 147.8 ppm (C).

Accepted Answer

Question 11

In the proton NMR spectrum,the indicated CH2 group will show up as a 2 group will show up as a   A) singlet. B) doublet. C) triplet. D) quartet. E) quintet." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  singlet.
B)  doublet.
C)  triplet.
D)  quartet.
E)  quintet.F) A) and C)
G) B) and C)

Question 12

What is the ratio of the protons in the following compound?

Accepted Answer

A)  3:3:3:2
B)  6:3:2
C)  9:2
D)  3:2
E)  6:2F) All of the above
G) B) and C)

Question 13

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 14

An unknown compound,C3H5Cl3,gave the following proton NMR data:
Doublet at 1.70 ppm (3H)
Multiplet at 4.32 ppm (1H)
Doublet at 5.85 ppm (1H)
What is the structure of the compound?

Accepted Answer

Question 15

The indicated hydrogens (Ha and Hb) are a and Hb) are   A) enantiotopic. B) diastereotopic. C) mesotopic. D) isotopic. E) none of the above." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  enantiotopic.
B)  diastereotopic.
C)  mesotopic.
D)  isotopic.
E)  none of the above.F) B) and D)
G) A) and E)

Question 16

What information does a COSY spectrum give?

Accepted Answer

Correlation between ...

Question 17

Mark with an asterisk each carbon that would not produce a signal in the DEPT 13C NMR spectrum of the compound below.

Accepted Answer

Question 18

Which of the compounds below most closely matches the following 1H NMR data:
7.6 (2H,d),7.3 (2H,d),3.5 (3H,s),2.2 (3H,s)?

Accepted Answer

Question 19

Determine the number of signals for isopentylamine in the 1H NMR spectrum.

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  6F) A) and D)
G) B) and D)

Question 20

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)  1F) A) and C)
G) A) and E)

Exam 14: Nmr Spectroscopy

What information does a COSY spectrum give?

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Correlation between ...
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The indicated hydrogens (H_a and H_b) are

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An unknown compound,C₃H₅Cl₃,gave the following proton NMR data: Doublet at 1.70 ppm (3H) Multiplet at 4.32 ppm (1H) Doublet at 5.85 ppm (1H) What is the structure of the compound?

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

Correct Answer
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Mark with an asterisk each carbon that would not produce a signal in the DEPT ¹³C NMR spectrum of the compound below.

Correct Answer
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Predict the number of signals expected,their splitting,and their relative area in the ¹H NMR spectrum of CH₃CH₂OCH₃.

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3 signals: (3H,tripl...
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Determine the number of signals for isopentylamine in the ¹H NMR spectrum.

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How many signals will be observed in the proton NMR spectrum of the following molecule?

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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 of the compounds below most closely matches the following ¹H NMR data: 7.6 (2H,d),7.3 (2H,d),3.5 (3H,s),2.2 (3H,s)?

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

Correct Answer
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Can alkenes and aromatics be easily distinguished from each other in an ¹³C NMR spectrum?

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Alkenes are in the range of 10...
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How many distinct carbon signals are expected in the proton-decoupled ¹³C NMR spectrum of the compound below?

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Provide the structure that is consistent with the data below. C₆H₁₁N IR (cm^-1): 2950,2230 ¹H NMR (δ): 1.7 (quintet,1H),1.2 (m,4H),0.9 (t,6H) ¹³C NMR (δ): 95 (s),45 (d),25 (t),18 (q)

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What is the ratio of the protons in the following compound?

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How many distinct triplets would you expect in the ¹H NMR of the compound below?

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Deduce the identity of the following compound from the ¹H NMR spectral data given. C₇H₁₂O₄ : δ 1.1 (6H,triplet),3.4 (2H,singlet),4.2 (4H,quartet)(ppm)

Correct Answer
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Correct Answer
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In the proton NMR spectrum,the indicated CH₂ group will show up as a

Correct Answer
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What is indicated by a cross peak in the COSY spectrum of a compound?

Correct Answer
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The dots that are not on the d...
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Exam 14: Nmr Spectroscopy

What information does a COSY spectrum give?

Correct AnswerverifiedCorrelation between ...View AnswerShow Answer

The indicated hydrogens (Ha and Hb) are

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An unknown compound,C3H5Cl3,gave the following proton NMR data: Doublet at 1.70 ppm (3H) Multiplet at 4.32 ppm (1H) Doublet at 5.85 ppm (1H) What is the structure of the compound?

Correct AnswerverifiedShow Answer

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

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Mark with an asterisk each carbon that would not produce a signal in the DEPT 13C NMR spectrum of the compound below.

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Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of CH3CH2OCH3.

Correct Answerverified3 signals: (3H,tripl...View AnswerShow Answer

Determine the number of signals for isopentylamine in the 1H NMR spectrum.

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How many signals will be observed in the proton NMR spectrum of the following molecule?

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

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Which of the compounds below most closely matches the following 1H NMR data: 7.6 (2H,d),7.3 (2H,d),3.5 (3H,s),2.2 (3H,s)?

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

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Can alkenes and aromatics be easily distinguished from each other in an 13C NMR spectrum?

Correct AnswerverifiedAlkenes are in the range of 10...View AnswerShow Answer

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

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Provide the structure that is consistent with the data below. C6H11N IR (cm-1): 2950,2230 1H NMR (δ): 1.7 (quintet,1H),1.2 (m,4H),0.9 (t,6H) 13C NMR (δ): 95 (s),45 (d),25 (t),18 (q)

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What is the ratio of the protons in the following compound?

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How many distinct triplets would you expect in the 1H NMR of the compound below?

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Deduce the identity of the following compound from the 1H NMR spectral data given. C7H12O4 : δ 1.1 (6H,triplet),3.4 (2H,singlet),4.2 (4H,quartet)(ppm)

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In the proton NMR spectrum,the indicated CH2 group will show up as a

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What is indicated by a cross peak in the COSY spectrum of a compound?

Correct AnswerverifiedThe dots that are not on the d...View AnswerShow Answer

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Correlation between ...
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The indicated hydrogens (H_a and H_b) are

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An unknown compound,C₃H₅Cl₃,gave the following proton NMR data: Doublet at 1.70 ppm (3H) Multiplet at 4.32 ppm (1H) Doublet at 5.85 ppm (1H) What is the structure of the compound?

Correct Answer
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Correct Answer
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Mark with an asterisk each carbon that would not produce a signal in the DEPT ¹³C NMR spectrum of the compound below.

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Predict the number of signals expected,their splitting,and their relative area in the ¹H NMR spectrum of CH₃CH₂OCH₃.

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3 signals: (3H,tripl...
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Determine the number of signals for isopentylamine in the ¹H NMR spectrum.

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

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Which of the compounds below most closely matches the following ¹H NMR data: 7.6 (2H,d),7.3 (2H,d),3.5 (3H,s),2.2 (3H,s)?

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

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Can alkenes and aromatics be easily distinguished from each other in an ¹³C NMR spectrum?

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Alkenes are in the range of 10...
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How many distinct carbon signals are expected in the proton-decoupled ¹³C NMR spectrum of the compound below?

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Provide the structure that is consistent with the data below. C₆H₁₁N IR (cm^-1): 2950,2230 ¹H NMR (δ): 1.7 (quintet,1H),1.2 (m,4H),0.9 (t,6H) ¹³C NMR (δ): 95 (s),45 (d),25 (t),18 (q)

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Correct Answer
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How many distinct triplets would you expect in the ¹H NMR of the compound below?

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Deduce the identity of the following compound from the ¹H NMR spectral data given. C₇H₁₂O₄ : δ 1.1 (6H,triplet),3.4 (2H,singlet),4.2 (4H,quartet)(ppm)

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Correct Answer
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In the proton NMR spectrum,the indicated CH₂ group will show up as a

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The dots that are not on the d...
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