Concept explainers
Interpretation:
Each of the unlabeled conformations as either eclipsed or staggered in Fig. 4-4 is to be labeled.
Concept introduction:
To understand the nature of a rotation about a given bond, we perform a conformational analysis, which is a plot of a molecule’s energy as a function of that bond’s dihedral angle. The energy values for various angles of rotation are relative to that of the lowest-energy conformation. Figure 4-4 depicts the conformational analysis of ethane (
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ORGANIC CHEMISTRY E-BOOK W/SMARTWORK5
- Draw the most stable conformation of pentane, using wedges and dashes to represent bonds coming out of the paper and going behind the paper, respectively.arrow_forwardConsider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.arrow_forwardIn the next chapter we'll look at cycloalkanes—saturated cyclic hydrocarbons—and we’ll see that the molecules generally adopt puckered, nonplanar conformations. Cyclohexane, for instance, has a puckered shape like a lounge chair rather than a flat shape. Why?arrow_forward
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- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning