Question 1

How many unique protons are present in each of the following compounds?

Accepted Answer

A)  I = 6; II = 3; III = 6
B)  I = 5; II = 4; III = 6
C)  I = 6,II = 4,III = 4
D)  I = 6; II = 4; III = 6E) A) and D)
F) B) and C)

Question 2

How many different kinds of protons are present in each of the following molecules?

Accepted Answer

A)  I = 6; II = 3; III = 4
B)  I = 5; II = 3; III = 4
C)  I = 6; II = 4; III = 5
D)  I = 6; II = 4; III = 4E) A) and D)
F) B) and C)

Question 3

How many peaks would be observed for each of the circled protons in the compounds below?

Accepted Answer

A)  I = 2; II = 6; III = 1
B)  I = 3; II = 5; III = 2
C)  I = 1; II = 5; III = 1
D)  I = 2; II = 6; III = 2E) A) and C)
F) C) and D)

Question 4

An unknown compound X has the empirical formula C3H6O and a molecular ion in its mass spectrum at 116.Compound X shows no IR absorption at 3200-3600 cm-1 but shows a peak at 1700 cm-1.The 1H NMR spectral data of X is shown below.What is the structure of compound X? 3H6O and a molecular ion in its mass spectrum at 116.Compound X shows no IR absorption at 3200-3600 cm-1 but shows a peak at 1700 cm-1.The 1H NMR spectral data of X is shown below.What is the structure of compound X?   A) I B) II C) III D) IV" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) C) and D)
F) B) and C)

Question 5

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Accepted Answer

A)  I = 3; II = 7; III = 4
B)  I = 2; II = 7; III = 4
C)  I = 2; II = 7; III = 3
D)  I = 2; II = 6; III = 4E) A) and B)
F) None of the above

Question 6

For each of the following compounds,indicate how many 13C NMR signals will be seen. 13C NMR signals will be seen.   A) a: 3; b: 3; c: 5; d: 3 B) a: 4; b: 3; c: 5; d: 3 C) a: 3; b: 4; c: 5; d: 3 D) a: 4; b: 3; c: 3; d: 3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a: 3; b: 3; c: 5; d: 3
B)  a: 4; b: 3; c: 5; d: 3
C)  a: 3; b: 4; c: 5; d: 3
D)  a: 4; b: 3; c: 3; d: 3E) B) and C)
F) C) and D)

Question 7

How many different kinds of 13C peaks will be seen? 13C peaks will be seen?   A) 2 B) 3 C) 4 D) 5" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 8

How many peaks would be observed for each of the circled protons in the compounds below?

Accepted Answer

A)  I = 1; II = 4; III = 7
B)  I = 3; II = 3; III = 7
C)  I = 2; II = 4; III = 7
D)  I = 2; II = 4; III = 6E) A) and B)
F) A) and C)

Question 9

For each of the following compounds,indicate how many 13C NMR signals will be observed. 13C NMR signals will be observed.   A) a: 4; b: 4; c: 7; d: 4 B) a: 5; b: 4; c: 7; d: 3 C) a: 4; b: 7; c: 7; d: 3 D) a: 5; b: 4; c: 6; d: 5" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  a: 4; b: 4; c: 7; d: 4
B)  a: 5; b: 4; c: 7; d: 3
C)  a: 4; b: 7; c: 7; d: 3
D)  a: 5; b: 4; c: 6; d: 5E) A) and D)
F) A) and C)

Question 10

How many different kinds of protons are present in the following molecule?

Accepted Answer

A)  2
B)  3
C)  4
D)  5E) None of the above
F) C) and D)

Question 11

How many different kinds of protons are present in each of the following compounds?

Accepted Answer

A)  I = 2; II = 4; III = 6
B)  I = 2; II = 4; III = 4
C)  I = 3; II = 3; III = 5
D)  I = 2; II = 4; III = 5E) None of the above
F) C) and D)

Exam 32: Organic Spectroscopy Concepts

For each of the following compounds,indicate how many ¹³C NMR signals will be observed.

Correct Answer
verified

An unknown compound X has the empirical formula C₃H₆O and a molecular ion in its mass spectrum at 116.Compound X shows no IR absorption at 3200-3600 cm^-1 but shows a peak at 1700 cm^-1.The ¹H NMR spectral data of X is shown below.What is the structure of compound X?

Correct Answer
verified

How many different kinds of protons are present in each of the following compounds?

Correct Answer
verified

How many different kinds of protons are present in each of the following molecules?

Correct Answer
verified

For each of the following compounds,indicate how many ¹³C NMR signals will be seen.

Correct Answer
verified

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Correct Answer
verified

How many unique protons are present in each of the following compounds?

Correct Answer
verified

How many peaks would be observed for each of the circled protons in the compounds below?

Correct Answer
verified

How many different kinds of protons are present in the following molecule?

Correct Answer
verified

How many different kinds of ¹³C peaks will be seen?

Correct Answer
verified

How many peaks would be observed for each of the circled protons in the compounds below?

Correct Answer
verified

Exam 32: Organic Spectroscopy Concepts

For each of the following compounds,indicate how many 13C NMR signals will be observed.

Correct AnswerverifiedShow Answer

An unknown compound X has the empirical formula C3H6O and a molecular ion in its mass spectrum at 116.Compound X shows no IR absorption at 3200-3600 cm-1 but shows a peak at 1700 cm-1.The 1H NMR spectral data of X is shown below.What is the structure of compound X?

Correct AnswerverifiedShow Answer

How many different kinds of protons are present in each of the following compounds?

Correct AnswerverifiedShow Answer

How many different kinds of protons are present in each of the following molecules?

Correct AnswerverifiedShow Answer

For each of the following compounds,indicate how many 13C NMR signals will be seen.

Correct AnswerverifiedShow Answer

Into how many peaks will each of the circled protons be split? (Assume complete resolution of all NMR peaks is possible)

Correct AnswerverifiedShow Answer

How many unique protons are present in each of the following compounds?

Correct AnswerverifiedShow Answer

How many peaks would be observed for each of the circled protons in the compounds below?

Correct AnswerverifiedShow Answer

How many different kinds of protons are present in the following molecule?

Correct AnswerverifiedShow Answer

How many different kinds of 13C peaks will be seen?

Correct AnswerverifiedShow Answer

How many peaks would be observed for each of the circled protons in the compounds below?

Correct AnswerverifiedShow Answer

For each of the following compounds,indicate how many ¹³C NMR signals will be observed.

Correct Answer
verified

An unknown compound X has the empirical formula C₃H₆O and a molecular ion in its mass spectrum at 116.Compound X shows no IR absorption at 3200-3600 cm^-1 but shows a peak at 1700 cm^-1.The ¹H NMR spectral data of X is shown below.What is the structure of compound X?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For each of the following compounds,indicate how many ¹³C NMR signals will be seen.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many different kinds of ¹³C peaks will be seen?

Correct Answer
verified

Correct Answer
verified