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Chapter 4: Q.21. (page 128)

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

Short Answer

Expert verified

Answer

The identification of the highlighted bonds, either axial or equatorial, is as illustrated below:

Step by step solution

01

Axial and equatorial positions

The horizontal and vertical bonding in any chair conformation is named equatorial (eq) and axial (ax) positions, respectively. The axial position is perpendicular to the structure.

02

Axial and equatorial bond in the given compound

The blue color shows the position of the axial bond, whereas the black color shows the position of the equatorial bond as illustrated below:

03

Comparing the above diagram with the given

The given conformation is compared with the above conformation. The highlighted bonds, as axial or equatorial, are as shown below:

Highlighted bonds as axial or equatorial

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Most popular questions from this chapter

Question: Classify each reaction as oxidation, reduction, or neither.

a.

b.

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: Calculate the barrier to rotation for each bond highlighted in pink.

a.

b.

Question: Hydrocarbons like benzene are metabolized in the body to arene oxides, which rearrange to form phenols. This is an example of a general process in the body, in which an unwanted compound (benzene) is converted to a more water-soluble derivative called a metabolite, so that it can be excreted more readily from the body.

a. Classify each of these reactions as oxidation, reduction, or neither.

b. Explain why phenol is more water soluble than benzene. This means that phenol dissolves in urine, which is largely water, to a greater extent than benzene.

Question: Draw the structure for each compound using wedges and dashed wedges.

  1. cis-1,2-dimethylcyclopropane
  2. trans-1-ethyl-2-methylcyclopentane
See all solutions

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