Question 1

Which of the following substituted cyclohexanes has the most negative value of  Δ\DeltaΔ G ∘\circ∘   for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

Accepted Answer

A)  fluorocyclohexane
B)  methylcyclohexane
C)  ethylcyclohexane
D)  tert-butylcyclohexane E) A) and D)
F) A) and C)

Question 2

Which of the following Newman projections represents the most stable conformation of 2-methylbutane?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and D)
F) C) and D) A

Question 3

The following structures represent a pair of constitutional isomers.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) C) and D)

Question 5

What is the IUPAC name of the following compound?

Accepted Answer

cis-1-tert-butyl-2-m...

Question 6

What is the IUPAC name for the following compound?

Accepted Answer

A)  bicyclo[5.4.3]octane
B)  bicyclo[3.2.1]octane
C)  bicyclo[3.2.1]hexane
D)  bicyclo[2.2.1]octaneE) A) and D)
F) None of the above B

Question 7

Provide a Newman projection of the most stable conformation of 2-methylpentane, (CH3)2CHCH2CH2CH3, looking along the C2-C3 bond

Accepted Answer

Question 8

How many hydrogen atoms are there in dodecane, the linear hydrocarbon with twelve carbon atoms?

Accepted Answer

A)  12
B)  20
C)  24
D)  26E) C) and D)
F) A) and B)

Question 9

Which of the following statements is not true regarding the conformation of substituted cyclohexanes?

Accepted Answer

A)  ring inversion of cyclohexane between two chair conformations takes place via a boat conformation
B)  substituted cyclohexanes are destabilized by 1,3-diaxial interactions
C)  the boat conformation of cyclohexane is usually more stable than the chair conformation
D)  the relative amount of two conformations of substituted cyclohexanes can be determined from the difference in strain energyE) A) and C)
F) A) and D)

Question 10

Provide a line-bond structure of hexanoic acid.

Accepted Answer

The answer of Provide a line-bond structure of hexanoic acid....

Question 11

What is the IUPAC name of the following compound?

Accepted Answer

A)  3-propylpentane
B)  1,1-diethylpropane
C)  3-ethylhexane
D)  isooctaneE) C) and D)
F) A) and B)

Question 12

How many hydrogen atoms are there in nonane, the linear hydrocarbon with nine carbon atoms?

Accepted Answer

A)  16
B)  18
C)  20
D)  22E) C) and D)
F) All of the above

Question 13

What is the IUPAC name of the following compound?

Accepted Answer

A)  trans-1-isopropyl-4-methylcyclopentane
B)  cis-1-tert-butyl-2-methylcyclopentane
C)  trans-1-tert-butyl-2-methylcyclopentane
D)  cis-1-isopropyl-2-methylcyclopentaneE) C) and D)
F) A) and B)

Question 14

Which of the following structures is different from the other three?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and B)
F) C) and D)

Question 15

What is the IUPAC name of the following compound?

Accepted Answer

3-ethyl-2-...

Question 16

Which of the following structures represents trans-1,3-dimethylcyclohexane?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) A) and D)
F) C) and D)

Question 17

How many constitutional isomers are there with the molecular formula C4H10?

Accepted Answer

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

Question 18

Match the Newman projection for the conformation of 2-methylbutane to the indicated position on the potential energy diagram.  A) B) C) 
D)
-Conformation D is represented by Roman numeral ____.

Accepted Answer

I

Question 19

Which of the following cycloalkanes has the smallest heat of combustion per carbon atom?

Accepted Answer

A)  cyclopropane
B)  cyclopentane
C)  cyclohexane
D)  cycloheptaneE) B) and D)
F) A) and D)

Question 20

What is the IUPAC name of the following compound?

Accepted Answer

2,4,4-trim...

Exam 2: Alkanes and Cycloalkanes

Which of the following substituted cyclohexanes has the most negative value of Δ\DeltaΔ G ∘\circ∘ for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

Correct AnswerverifiedShow Answer

Which of the following Newman projections represents the most stable conformation of 2-methylbutane?

Correct AnswerverifiedA

The following structures represent a pair of constitutional isomers.

Correct AnswerverifiedShow Answer

Which of the following is the most stable conformation of trans-1-ethyl-3-methylcyclohexane?

Correct AnswerverifiedShow Answer

What is the IUPAC name of the following compound?

Correct Answerverifiedcis-1-tert-butyl-2-m...View AnswerShow Answer

What is the IUPAC name for the following compound?

Correct AnswerverifiedB

Provide a Newman projection of the most stable conformation of 2-methylpentane, (CH3)2CHCH2CH2CH3, looking along the C2-C3 bond

Correct AnswerverifiedShow Answer

How many hydrogen atoms are there in dodecane, the linear hydrocarbon with twelve carbon atoms?

Correct AnswerverifiedShow Answer

Which of the following statements is not true regarding the conformation of substituted cyclohexanes?

Correct AnswerverifiedShow Answer

Provide a line-bond structure of hexanoic acid.

Correct AnswerverifiedShow Answer

What is the IUPAC name of the following compound?

Correct AnswerverifiedShow Answer

How many hydrogen atoms are there in nonane, the linear hydrocarbon with nine carbon atoms?

Correct AnswerverifiedShow Answer

What is the IUPAC name of the following compound?

Correct AnswerverifiedShow Answer

Which of the following structures is different from the other three?

Correct AnswerverifiedShow Answer

What is the IUPAC name of the following compound?

Correct Answerverified3-ethyl-2-...View AnswerShow Answer

Which of the following structures represents trans-1,3-dimethylcyclohexane?

Correct AnswerverifiedShow Answer

How many constitutional isomers are there with the molecular formula C4H10?

Correct AnswerverifiedShow Answer

Match the Newman projection for the conformation of 2-methylbutane to the indicated position on the potential energy diagram. A) B) C) D) -Conformation D is represented by Roman numeral ____.

Correct AnswerverifiedI

Which of the following cycloalkanes has the smallest heat of combustion per carbon atom?

Correct AnswerverifiedShow Answer

What is the IUPAC name of the following compound?

Correct Answerverified2,4,4-trim...View AnswerShow Answer

Which of the following substituted cyclohexanes has the most negative value of $\Delta$ G^$\circ$ for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

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A

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cis-1-tert-butyl-2-m...
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B

Provide a Newman projection of the most stable conformation of 2-methylpentane, (CH₃)₂CHCH₂CH₂CH₃, looking along the C2-C3 bond

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3-ethyl-2-...
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How many constitutional isomers are there with the molecular formula C₄H₁₀?

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I

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2,4,4-trim...
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