Question 1

Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of (CH3)3CCHO.

Accepted Answer

2 signals:...

Question 2

Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of 1,2-dichloroethane (ClCH2CH2Cl).

Accepted Answer

Question 3

Provide the structure that is consistent with the data below.
C5H10O2
IR (cm-1): 3300-2800 (v.broad),2950,1710
1H NMR (δ): 12.0 (broad s,1H),0.9 (s,9H)
13C NMR (δ): 220 (s),45 (s),12 (q)

Accepted Answer

Question 4

Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in 1H NMR spectroscopy? 1H NMR spectroscopy?   A) I B) II C) III D) IV E) V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I
B)  II
C)  III
D)  IV
E)  V

Question 5

Predict the number of signals in the 13C NMR spectrum for the following structure. 13C NMR spectrum for the following structure.   A) 5 B) 6 C) 7 D) 8 E) 9" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  5
B)  6
C)  7
D)  8
E)  9

Question 6

How might the two trimethylcyclohexane isomers shown below be most readily distinguished using NMR?

Accepted Answer

Number of ...

Question 7

How might the proton spectrum of ultrapure dimethylamine,(CH3)2NH,differ from the spectrum of this compound to which D2O has been added?

Accepted Answer

N-H signal will broa...

Question 8

Provide the structure that is consistent with the data below.
C5H8Cl2
IR (cm-1): 2950
1H NMR (d): 1.4 (4H,t),1.2 (4H,t)
13C NMR (d): 62 (s),26 (t),23 (t)

Accepted Answer

Question 9

Provide the structure that is consistent with the data below.
C5H10O2
IR (cm-1): 2950,1720
1H NMR (δ): 3.6 (s,3H),2.5 (septet,1H),0.9 (d,6H)
13C NMR (δ): 190 (s),55 (q),40 (d),16 (q)

Accepted Answer

Question 10

Deduce the identity of the compound from the data provided.
C10H14O: IR (cm-1): 3200-3500 (broad),3050,2950,1610
 1H NMR(δ): 1.0 (s,6H),2.0 (s,3H),2.8 (broad s,1H),
7.3 (d,2H),7.6 (d,2H)

Accepted Answer

Question 11

What would be the splitting pattern observed for the indicated hydrogens in the proton NMR spectrum of the following molecule?

Accepted Answer

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

Question 12

Provide the structure that is consistent with the data below.
C5H10O
IR (cm-1): 2950
1H NMR (d): 3.5 (4H,s),0.9 (6H,s)
13C NMR (d): 64 (t),41 (s),12 (q)

Accepted Answer

Question 13

What multiplicities are observed in the spin coupled 13C NMR spectrum of 2,3-dimethyl-2-butene?

Accepted Answer

a singlet ...

Question 14

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.

Question 15

Deduce the identity of the following compound from the spectral data given.
C7H10O2: 1H NMR,δ 1.16 (3H,singlet),2.21 (2H,singlet); 13C NMR,δ 216.25 (singlet),52.57 (singlet),34.51 (triplet),20.22 (quartet)

Accepted Answer

2,2-dimeth...

Question 16

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) 2 B) 5 C) 1 D) 4 E) 3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 17

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) 6 B) 3 C) 5 D) 4 E) 2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  6
B)  3
C)  5
D)  4
E)  2

Question 18

How can NMR spectroscopy be used to determine the formation of the product in the following reaction?

Accepted Answer

Characteristic peaks (two doub...

Question 19

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

Question 20

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

Accepted Answer

A)  4
B)  5
C)  6
D)  7
E)  8

Exam 14: Nmr Spectroscopy

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

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Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of (CH3)3CCHO.

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Predict the number of signals expected,their splitting,and their relative area in the 1H NMR spectrum of 1,2-dichloroethane (ClCH2CH2Cl).

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What would be the splitting pattern observed for the indicated hydrogens in the proton NMR spectrum of the following molecule?

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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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The indicated hydrogens (Ha and Hb) are

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Deduce the identity of the compound from the data provided. C10H14O: IR (cm-1): 3200-3500 (broad),3050,2950,1610 1H NMR(δ): 1.0 (s,6H),2.0 (s,3H),2.8 (broad s,1H), 7.3 (d,2H),7.6 (d,2H)

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What multiplicities are observed in the spin coupled 13C NMR spectrum of 2,3-dimethyl-2-butene?

Correct Answerverifieda singlet ...View AnswerShow Answer

Provide the structure that is consistent with the data below. C5H10O2 IR (cm-1): 2950,1720 1H NMR (δ): 3.6 (s,3H),2.5 (septet,1H),0.9 (d,6H) 13C NMR (δ): 190 (s),55 (q),40 (d),16 (q)

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How might the proton spectrum of ultrapure dimethylamine,(CH3)2NH,differ from the spectrum of this compound to which D2O has been added?

Correct AnswerverifiedN-H signal will broa...View AnswerShow Answer

Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in 1H NMR spectroscopy?

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Predict the number of signals in the 13C NMR spectrum for the following structure.

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Provide the structure that is consistent with the data below. C5H8Cl2 IR (cm-1): 2950 1H NMR (d): 1.4 (4H,t),1.2 (4H,t) 13C NMR (d): 62 (s),26 (t),23 (t)

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How can NMR spectroscopy be used to determine the formation of the product in the following reaction?

Correct AnswerverifiedCharacteristic peaks (two doub...View AnswerShow Answer

Provide the structure that is consistent with the data below. C5H10O IR (cm-1): 2950 1H NMR (d): 3.5 (4H,s),0.9 (6H,s) 13C NMR (d): 64 (t),41 (s),12 (q)

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Provide the structure that is consistent with the data below. C5H10O2 IR (cm-1): 3300-2800 (v.broad),2950,1710 1H NMR (δ): 12.0 (broad s,1H),0.9 (s,9H) 13C NMR (δ): 220 (s),45 (s),12 (q)

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

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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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Deduce the identity of the following compound from the spectral data given. C7H10O2: 1H NMR,δ 1.16 (3H,singlet),2.21 (2H,singlet); 13C NMR,δ 216.25 (singlet),52.57 (singlet),34.51 (triplet),20.22 (quartet)

Correct Answerverified2,2-dimeth...View AnswerShow Answer

How might the two trimethylcyclohexane isomers shown below be most readily distinguished using NMR?

Correct AnswerverifiedNumber of ...View AnswerShow Answer

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Predict the number of signals expected,their splitting,and their relative area in the ¹H NMR spectrum of (CH₃)₃CCHO.

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2 signals:...
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Predict the number of signals expected,their splitting,and their relative area in the ¹H NMR spectrum of 1,2-dichloroethane (ClCH₂CH₂Cl).

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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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The indicated hydrogens (H_a and H_b) are

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Deduce the identity of the compound from the data provided. C₁₀H₁₄O: IR (cm^-1): 3200-3500 (broad),3050,2950,1610 ¹H NMR(δ): 1.0 (s,6H),2.0 (s,3H),2.8 (broad s,1H), 7.3 (d,2H),7.6 (d,2H)

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What multiplicities are observed in the spin coupled ¹³C NMR spectrum of 2,3-dimethyl-2-butene?

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a singlet ...
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Provide the structure that is consistent with the data below. C₅H₁₀O₂ IR (cm^-1): 2950,1720 ¹H NMR (δ): 3.6 (s,3H),2.5 (septet,1H),0.9 (d,6H) ¹³C NMR (δ): 190 (s),55 (q),40 (d),16 (q)

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How might the proton spectrum of ultrapure dimethylamine,(CH₃)₂NH,differ from the spectrum of this compound to which D₂O has been added?

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N-H signal will broa...
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Which of the following methyl groups will exhibit the most downfield (highest) chemical shift in ¹H NMR spectroscopy?

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Predict the number of signals in the ¹³C NMR spectrum for the following structure.

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Provide the structure that is consistent with the data below. C₅H₈Cl₂ IR (cm^-1): 2950 ¹H NMR (d): 1.4 (4H,t),1.2 (4H,t) ¹³C NMR (d): 62 (s),26 (t),23 (t)

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Characteristic peaks (two doub...
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Provide the structure that is consistent with the data below. C₅H₁₀O IR (cm^-1): 2950 ¹H NMR (d): 3.5 (4H,s),0.9 (6H,s) ¹³C NMR (d): 64 (t),41 (s),12 (q)

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Provide the structure that is consistent with the data below. C₅H₁₀O₂ IR (cm^-1): 3300-2800 (v.broad),2950,1710 ¹H NMR (δ): 12.0 (broad s,1H),0.9 (s,9H) ¹³C NMR (δ): 220 (s),45 (s),12 (q)

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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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Deduce the identity of the following compound from the spectral data given. C₇H₁₀O₂: ¹H NMR,δ 1.16 (3H,singlet),2.21 (2H,singlet); ¹³C NMR,δ 216.25 (singlet),52.57 (singlet),34.51 (triplet),20.22 (quartet)

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2,2-dimeth...
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Number of ...
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