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Chapter 4: Q.10. (page 128)

Question: Give the IUPAC name for each of the five constitutional isomers of molecular formula C6H14 in Problem 4.3.

Short Answer

Expert verified

Answer

  • Hexane
  • 2-methylpentane
  • 3-methylpentane
  • 2,2-dimethylbutane
  • 2,3-dimethylbutane

Step by step solution

01

IUPAC naming 

Rules for IUPAC naming:

  • The longest chain of carbon atoms is selected.
  • The counting is started from the carbon with maximum substitution.
  • The functional groups are given the highest priority.
02

Isomers of  C6H14

The isomers of the given compound are represented below:

Isomers of C6H14

03

Explanation

  • The IUPAC name of the first isomer is hexane as it has a linear chain.
  • The IUPAC name of the second isomer is 2-methylpentane as it has a chain of five carbons with a methyl group at the second position.
  • The IUPAC name of the third isomer is 3-methylpentane as it has a chain of five carbons with a methyl group at the third position.
  • The IUPAC name of the fourth isomer is 2,2-dimethylbutane as it has a chain of four carbons with two methyl groups at the second position.
  • The IUPAC name of the fifth isomer is 2,3-dimethylbutane as it has a chain of four carbons and two methyl groups at the second and third positions.

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Most popular questions from this chapter

Question: Explain why beeswax is insoluble in H2O, slightly soluble in ethanol (CH3CH2OH), and soluble in chloroform role="math" localid="1648544714807" (CHCl3).

Question: Classify the ring carbons as up C鈥檚 or down C鈥檚. Identify the bonds highlighted in bold as axial or equatorial.

Question: Classify each pair of compounds as constitutional isomers, stereoisomers, identical molecules, or not isomers of each other.

a.

b.

c.

d.

Question: Give the structure corresponding to each IUPAC name.

a. 1,2-dimethylcyclobutane d. 1-sec-butyl-3-isopropylcyclopentane

b. 1,1,2-trimethylcyclopropane e. 1,1,2,3,4-pentamethylcycloheptane

c. 4-ethyl-1,2-dimethylcyclohexane

Question: Draw the two possible chair conformations for cis-1,3-dimethylcyclohexane. Which conformation, if either, is more stable?
See all solutions

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