Question 1

What are the common and IUPAC names of the following compound?

Accepted Answer

common: is...

Question 2

Which of the following substituted cyclohexanes has the most negative value of ΔG° for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

Accepted Answer

A)   methylcyclohexane
B)   chlorocyclohexane
C)   isopropylcyclohexane
D)   ethynylcyclohexaneE) C) and D)
F) B) and D)

Question 3

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

Accepted Answer

Question 4

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

Accepted Answer

The answer of Match the Newman projection for the conformation...

Question 5

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) B) and D)
F) A) and C)

Question 6

Which of the following undergoes the most exothermic combustion?

Accepted Answer

A)   octane
B)   2-methylheptane
C)   2,2-dimethylhexane
D)   2,2,3,3-tetramethylbutaneE) C) and D)
F) A) and B)

Question 7

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

Accepted Answer

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

Question 8

Which of the following cycloalkanes has the most ring strain?

Accepted Answer

A)   cyclopropane
B)   cyclobutane
C)   cyclopentane
D)   cyclohexaneE) A) and B)
F) B) and D)

Question 9

What is the approximate C−C−C bond angle in propane?

Accepted Answer

A)   90°
B)   109°
C)   120°
D)   180°E) A) and B)
F) A) and C)

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

What is the IUPAC name of the following compound?

Accepted Answer

A)   5,5-dimethyl-3-ethylheptane
B)   5-ethyl-3,3-dimethyl-heptane
C)   3,3-dimethyl-5-ethylheptane
D)   3-ethyl-5,5-dimethyl-heptaneE) All of the above
F) B) and C)

Question 13

What are the common and IUPAC names of the following compound?

Accepted Answer

common: ne...

Question 14

What is the IUPAC name of the following compound?

Accepted Answer

cis-1-isop...

Question 15

Which of the following is not true regarding the properties of alkanes?

Accepted Answer

A)   alkanes are nonpolar
B)   alkanes burn in air to give H2O and CO2
C)   alkanes are highly miscible with water
D)   the strongest intermolecular force between alkane molecules is the van der Waals interactionE) B) and C)
F) All of the above

Question 16

What is the IUPAC name of the following compound?

Accepted Answer

4-ethyl-2-...

Question 17

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) All of the above
F) C) and D)

Question 18

Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) All of the above
F) A) and B)

Question 19

What is the IUPAC name of the following compound?

Accepted Answer

A)   trans-1-isopropyl-4-methylcyclohexane
B)   cis-1-isopropyl-4-methylcyclohexane
C)   cis-2-isopropyl-5-methylcyclohexane
D)   cis-1-tert-butyl-4-methylcyclohexaneE) None of the above
F) B) and D)

Question 20

What is the IUPAC name of the following compound?

Accepted Answer

bicyclo[4....

Exam 2: Alkanes and Cycloalkanes

Which of the following is not true regarding the properties of alkanes?

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What is the IUPAC name for the following compound?

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What is the IUPAC name of the following compound?

Correct Answerverifiedbicyclo[4....View AnswerShow Answer

What is the IUPAC name of the following compound?

Correct Answerverifiedcis-1-isop...View AnswerShow Answer

Which of the following substituted cyclohexanes has the most negative value of ΔG° for ring flipping from the conformation in which the substituent is axial to the one where it is equatorial?

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

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What are the common and IUPAC names of the following compound?

Correct Answerverifiedcommon: ne...View AnswerShow Answer

What is the IUPAC name of the following compound?

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What is the approximate C−C−C bond angle in propane?

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Which of the following cycloalkanes has the most ring strain?

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Which of the following is the most stable conformation of cis-1-isopropyl-3-methylcyclohexane?

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Which of the following undergoes the most exothermic combustion?

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

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What is the IUPAC name of the following compound?

Correct Answerverified4-ethyl-2-...View AnswerShow Answer

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

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

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What is the IUPAC name of the following compound?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What are the common and IUPAC names of the following compound?

Correct Answerverifiedcommon: is...View AnswerShow Answer

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

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bicyclo[4....
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cis-1-isop...
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common: ne...
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4-ethyl-2-...
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Provide a Newman projection of the most stable conformation of 2-methylpentane, (CH₃)₂CHCH₂CH₂CH₃, looking along the C2-C3 bond

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

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

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common: is...
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