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Exam 2: Alkanes and Cycloalkanes

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Question 31

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Which one of the following structures represents a different compound from the other three?

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

E) C) and D)
F) None of the above

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Question 32

Multiple Choice

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What is the approximate dihedral angle between the two chlorine atoms in cis-1,2-dichlorocyclohexane?

A) 0 ^$\circ$
B) 60 ^$\circ$
C) 120 ^$\circ$
D) 180 ^$\circ$

E) A) and D)
F) B) and D)

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Question 33

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Which of the following cycloalkanes has the largest heat of combustion?

Which of the following Newman projections represents 2,4-dimethylpentane?

What is the IUPAC name of the following compound?

In the following structure the positions labeled a and d are equatorial positions.

What is the IUPAC name of the following compound?

How many hydrogen atoms are there in decane?

In the following conversion, the conformations are of equal stability.

Which of the following alkanes has the highest boiling point?

The most stable conformation of an alkane occurs when carbon-carbon bonds are staggered and bulky groups are anti.

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

Provide a neatly drawn plot of energy versus dihedral angle for rotation around the C2-C3 bond of butane.

Which one of the following structures represents a different compound from the other three?

What is the IUPAC name of the following compound?

The following Newman projection represents 2-methylhexane.

Provide a neatly drawn plot of energy versus dihedral angle for rotation around the C-C bond of ethane.

Which of the following cycloalkanes has the most ring strain?

Provide a Newman projection of the most stable conformation of 3-methylpentane, CH₃CH₂CH(CH₃)CH₂CH₃ looking along the C2-C3 bond.

What is the IUPAC name of the following compound?