Question 1

Draw a Newman projection of cyclohexane looking along two C-C  bonds that are separated by one carbon.

Accepted Answer

The answer of Draw a Newman projection of cyclohexane looking...

Question 2

Draw the boat conformation of cyclohexane and identify the hydrogens that are the source of van
der Waals strain.

Accepted Answer

The proximity of these hydroge...

Question 3

Assuming  98.85 %  of the molecules are in the conformation with the group A equatorial, what is the value of  ΔG°  for this equilibrium at  25°C? R=1.987 x10-3 kcal/mol K 
-3 kcal/mol K    A)   -2.64 kcal/mol B)   -2.72 kcal/mol C)   0.228 kcal/mol D)   2.64 kcal/mol E)   2.72 kcal/mol " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)    -2.64 kcal/mol
B)    -2.72 kcal/mol
C)    0.228 kcal/mol
D)    2.64 kcal/mol
E)    2.72 kcal/molF) C) and D)
G) A) and B)

Question 4

What is the correct structure for bicyclo[3.3.1]nonane?

Accepted Answer

A)    
B)   
C)    
D)    
E)   F) C) and E)
G) B) and C)

Question 5

Using the heats of combustion per CH2 given, select the least stable compound in the set.All values are in kcal/mol. 2 given, select the least stable compound in the set.All values are in kcal/mol.   A) A B) B C) C D) D E) E" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) B) and E)
G) A) and B)

Question 6

Draw the chair conformation of cyclohexane and identify all axial and equatorial hydrogens.

Accepted Answer

The answer of Draw the chair conformation of cyclohexane and...

Question 7

Draw both chair conformations of trans-1-isopropyl-2-methylcyclohexane and identify the more
stable chair conformation.

Accepted Answer

The answer of Draw both chair conformations of trans-1-isopropyl-2-methylcyclohexane and...

Question 8

Use Newman projections of the less stable conformer of methylcyclohexane to identify all
interactions that raise its energy relative to the more stable conformer.

Accepted Answer

The less stable chair conformation is the one that has the methyl group in an axial position.The
methyl group (carbon "1" in the drawing below) experiences two gauche interactions with two
ring methylenes (carbons 4 and 6) as shown in the Newman projections.

Question 9

Which of these compounds can adopt the most stable conformation?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) C) and D)

Question 10

Which molecule do you expect to be more stable, A or B?

Accepted Answer

In both molecules, we would expect there...

Question 11

Use the heat of combustion provided to select the most stable compound.All values are in kcal/mole.

Accepted Answer

A)  Cyclooctane, 1269.2
B)  Cyclononane, 1429.6
C)  Cyclodecane, 1586.8
D)  Cycloundecane, 1743.1
E)  Cyclobutane, 499.8F) B) and E)
G) A) and E)

Question 12

How many signals would appear in the  13C NMR spectrum for this molecule?
13C NMR spectrum for this molecule?   A)  2 B)  3 C)  4 D)  5 E)  7 " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   7F) None of the above
G) A) and E) E

Question 13

Which structure is fused?

Accepted Answer

A)    
B)    
C)   
D)   
E)   F) C) and D)
G) A) and C)

Question 14

Explain why axial methylcyclohexane and equatorial methylcyclohexane cannot be separated from
each other at room temperature.

Accepted Answer

Axial and equatorial methylcyclohexane a...

Question 15

Select any and all words that correctly describe the relationship between groups A and B in the structure shown here. 
I. anti
II. gauche
III. eclipsed
IV. cis
V. trans

Accepted Answer

A)   I
B)   II
C)   III
D)   I and V
E)   II and  VF) C) and E)
G) A) and C)

Question 16

Draw the most stable conformer of trans-1-bromo-4-methylcyclohexane in three dimensions.

Accepted Answer

The answer of Draw the most stable conformer of trans-1-bromo-4-methylcyclohexane...

Question 17

Draw the structure of bicyclo[3.2.1]octane.

Accepted Answer

The answer of Draw the structure of bicyclo[3.2.1]octane....

Question 18

Which of the following statements is true?

Accepted Answer

A)   trans-Decalin cannot undergo ring flip.
B)   cis-Decalin cannot undergo ring flip.
C)   In trans-decalin, the bridgehead hydrogens are both equatorial.
D)   In cis-decalin, the bridgehead hydrogens are both axial.
E)   Both a and c.F) A) and B)
G) A) and E) A

Question 19

Which of the following structures is trans-decalin?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and D)
G) A) and D)

Question 20

Draw a Newman projection along the indicated bond of the conformer below.

Accepted Answer

The answer of Draw a Newman projection along the indicated...

Exam 5: Rings

Draw a Newman projection of cyclohexane looking along two C-C bonds that are separated by one carbon.

Correct Answer
verified

Draw the boat conformation of cyclohexane and identify the hydrogens that are the source of van der Waals strain.

Correct Answer
verified
The proximity of these hydroge...
View Answer

Assuming 98.85 % of the molecules are in the conformation with the group A equatorial, what is the value of ΔG° for this equilibrium at 25°C? R=1.987 x10^-3 kcal/mol K

Correct Answer
verified

What is the correct structure for bicyclo[3.3.1]nonane?

Correct Answer
verified

Using the heats of combustion per CH₂ given, select the least stable compound in the set.All values are in kcal/mol.

Correct Answer
verified

Draw the chair conformation of cyclohexane and identify all axial and equatorial hydrogens.

Correct Answer
verified

Draw both chair conformations of trans-1-isopropyl-2-methylcyclohexane and identify the more stable chair conformation.

Correct Answer
verified

Use Newman projections of the less stable conformer of methylcyclohexane to identify all interactions that raise its energy relative to the more stable conformer.

Which of these compounds can adopt the most stable conformation?

Correct Answer
verified

Which molecule do you expect to be more stable, A or B?

Correct Answer
verified
In both molecules, we would expect there...
View Answer

Use the heat of combustion provided to select the most stable compound.All values are in kcal/mole.

Correct Answer
verified

How many signals would appear in the ¹³C NMR spectrum for this molecule?

Correct Answer
verified
E

Which structure is fused?

Correct Answer
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Explain why axial methylcyclohexane and equatorial methylcyclohexane cannot be separated from each other at room temperature.

Correct Answer
verified
Axial and equatorial methylcyclohexane a...
View Answer

Select any and all words that correctly describe the relationship between groups A and B in the structure shown here. I. anti II. gauche III. eclipsed IV. cis V. trans

Correct Answer
verified

Draw the most stable conformer of trans-1-bromo-4-methylcyclohexane in three dimensions.

Correct Answer
verified

Draw the structure of bicyclo[3.2.1]octane.

Correct Answer
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Which of the following statements is true?

Correct Answer
verified
A

Which of the following structures is trans-decalin?

Correct Answer
verified

Draw a Newman projection along the indicated bond of the conformer below.

Correct Answer
verified

Exam 5: Rings

Draw a Newman projection of cyclohexane looking along two C-C bonds that are separated by one carbon.

Correct AnswerverifiedShow Answer

Draw the boat conformation of cyclohexane and identify the hydrogens that are the source of van der Waals strain.

Correct AnswerverifiedThe proximity of these hydroge...View AnswerShow Answer

Assuming 98.85 % of the molecules are in the conformation with the group A equatorial, what is the value of ΔG° for this equilibrium at 25°C? R=1.987 x10-3 kcal/mol K

Correct AnswerverifiedShow Answer

What is the correct structure for bicyclo[3.3.1]nonane?

Correct AnswerverifiedShow Answer

Using the heats of combustion per CH2 given, select the least stable compound in the set.All values are in kcal/mol.

Correct AnswerverifiedShow Answer

Draw the chair conformation of cyclohexane and identify all axial and equatorial hydrogens.

Correct AnswerverifiedShow Answer

Draw both chair conformations of trans-1-isopropyl-2-methylcyclohexane and identify the more stable chair conformation.

Correct AnswerverifiedShow Answer

Use Newman projections of the less stable conformer of methylcyclohexane to identify all interactions that raise its energy relative to the more stable conformer.

Which of these compounds can adopt the most stable conformation?

Correct AnswerverifiedShow Answer

Which molecule do you expect to be more stable, A or B?

Correct AnswerverifiedIn both molecules, we would expect there...View AnswerShow Answer

Use the heat of combustion provided to select the most stable compound.All values are in kcal/mole.

Correct AnswerverifiedShow Answer

How many signals would appear in the 13C NMR spectrum for this molecule?

Correct AnswerverifiedE

Which structure is fused?

Correct AnswerverifiedShow Answer

Explain why axial methylcyclohexane and equatorial methylcyclohexane cannot be separated from each other at room temperature.

Correct AnswerverifiedAxial and equatorial methylcyclohexane a...View AnswerShow Answer

Select any and all words that correctly describe the relationship between groups A and B in the structure shown here. I. anti II. gauche III. eclipsed IV. cis V. trans

Correct AnswerverifiedShow Answer

Draw the most stable conformer of trans-1-bromo-4-methylcyclohexane in three dimensions.

Correct AnswerverifiedShow Answer

Draw the structure of bicyclo[3.2.1]octane.

Correct AnswerverifiedShow Answer

Which of the following statements is true?

Correct AnswerverifiedA

Which of the following structures is trans-decalin?

Correct AnswerverifiedShow Answer

Draw a Newman projection along the indicated bond of the conformer below.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
The proximity of these hydroge...
View Answer

Assuming 98.85 % of the molecules are in the conformation with the group A equatorial, what is the value of ΔG° for this equilibrium at 25°C? R=1.987 x10^-3 kcal/mol K

Correct Answer
verified

Correct Answer
verified

Using the heats of combustion per CH₂ given, select the least stable compound in the set.All values are in kcal/mol.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In both molecules, we would expect there...
View Answer

Correct Answer
verified

How many signals would appear in the ¹³C NMR spectrum for this molecule?

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified
Axial and equatorial methylcyclohexane a...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A

Correct Answer
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Correct Answer
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