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Chapter 4: Q.46. (page 128)

Question: Considering rotation around the bond highlighted in pink in each compound, draw Newman projections for the most stable and least stable conformations.

a.

b.

Short Answer

Expert verified

Answer

a.

b.

Step by step solution

01

Conformation

The conformation is the molecule's structure, which is obtained by the rotation of the single bond in the molecules.

02

Eclipsed conformation

The eclipsed conformation is obtained when the two substituents on the two corresponding carbon atoms have zero-degree angles or overlap.

The eclipsed conformation is always higher in energy compared to the staggered conformation.

03

Staggered conformation

The staggered conformation is obtained when the two substituents on the two corresponding carbon atoms have a600 angle.

04

Explanation

a.

The Newman projection of the given molecule is shown as:

Newman projection

b.

The Newman projection of the given molecule is shown as:

Newman projection

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Most popular questions from this chapter

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

Question: Classify each transformation as an oxidation, reduction, or neither.

a.

b.

c.

d.

Question: Draw the staggered and eclipsed conformations that result from rotation around the C-C bond in CH3-CH2Br.

Give the structure corresponding to each IUPAC name.

a. 1,2-dimethylcyclobutane

b. 1,1,2-trimethylcyclopropane

c. 4-ethyl-1,2-dimethylcyclohexane

d. 1-sec-butyl-3-isopropylcyclopentane

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

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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