Organic Chemistry

John McMurry

ISBN #9781305080485

9th Edition

1,986 Questions

21,829 Students Helped

Homework Questions

Summary

Learning Objectives

Key Concepts

Example Problems

Explanations

Common Mistakes

Summary

This section provides a comprehensive overview of organic reaction types, mechanisms, and their energy profiles. Key concepts include polar versus radical reactions, the use of curved arrows to depict electron flow, and the significance of transition states and reaction intermediates in energy diagrams. Understanding these fundamental concepts is essential for predicting reaction outcomes and designing effective chemical processes, both in the laboratory and in biological settings.

Learning Objectives

Key Concepts

CONCEPT

DEFINITION

Acid–Base Chemistry

The study of acids and bases using both the Brønsted–Lowry (proton-donating/accepting) and Lewis (electron pair accepting/donating) frameworks, including quantification via pKa values, which together explain chemical reactivity in organic molecules. •

Example Problems

Example 1

Classify each of the following reactions as an addition, elimination, substitution, or rearrangement: (a) $\mathrm{CH}_{3} \mathrm{Br}+\mathrm{KOH} \rightarrow \mathrm{CH}_{3} \mathrm{OH}+\mathrm{KBr}$ (b) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br} \rightarrow \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}+\mathrm{HBr}$ (c) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}+\mathrm{H}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{3}$

Example 2

Radical chlorination of alkanes is not generally useful because mixtures of products often result when more than one kind of $\mathrm{C}-\mathrm{H}$ bond is present in the substrate. Draw and name all monochloro substitution products $\mathrm{C}_{6} \mathrm{H}_{13} \mathrm{Cl}$ you might obtain by reaction of 2 -methylpentane with $\mathrm{Cl}_{2}$.

Example 3

Using curved fishhook arrows, propose a mechanism for the formation of the cyclopentane ring of prostaglandin $\mathrm{H}_{2}$.

Example 4

Which of the following species are likely to be nucleophiles and which electrophiles? Which might be both? a. b. c. d.

Example 5

An electrostatic potential map of boron trifluoride is shown. Is $\mathrm{BF}_{3}$ likely to be a nucleophile or an electrophile? Draw a Lewis structure for $\mathrm{BF}_{3}$, and explain your answer.