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Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
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All textbooksMullins 1st EditionCh. 24 - Benzene II: Reactions Influenced by the Aromatic RingProblem 6
Chapter 23, Problem 6

What is the product of the following reaction?
Chemical reaction diagram showing an alcohol reacting with sodium and a bromide to form an ether product.

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1
Identify the starting material as an alcohol, specifically propanol, which has the structure \( \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} \).
Recognize that the first reagent, \( \text{Na}^0 \), is metallic sodium. This will react with the alcohol to form an alkoxide ion by deprotonating the hydroxyl group.
Write the reaction of propanol with sodium: \( \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} + \text{Na} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{O}^-\text{Na}^+ + \frac{1}{2}\text{H}_2 \). This forms sodium propoxide.
Consider the second step, which involves the reaction of the sodium propoxide with 2-bromobutane. This is a nucleophilic substitution reaction where the alkoxide ion acts as a nucleophile.
Predict the product of the nucleophilic substitution: the alkoxide ion \( \text{CH}_3\text{CH}_2\text{CH}_2\text{O}^- \) will attack the electrophilic carbon in 2-bromobutane, displacing the bromide ion and forming an ether, specifically butyl propyl ether.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Reaction Mechanisms

Understanding reaction mechanisms is crucial in organic chemistry as they describe the step-by-step process by which reactants transform into products. This includes identifying intermediates, transition states, and the movement of electrons. A clear grasp of mechanisms helps predict the outcome of reactions and the stability of products formed.
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Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups allows chemists to predict reactivity and the types of products that can be formed in a reaction. Common functional groups include alcohols, carboxylic acids, and amines.
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Stereochemistry

Stereochemistry involves the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. It is essential for understanding isomerism, where compounds with the same molecular formula can have different structures and properties. Stereochemical considerations can significantly influence the outcome of reactions, especially in chiral environments.
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Related Practice
Textbook Question

Look closely at the resonance structures of the benzylic anions, radicals, and cations in Figures 24.2–24.4. On which benzene carbons did the charge/radical exist in the resonance structures—that is, were they ortho, meta, or para?

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Textbook Question

Calculate the oxidation number of the indicated atoms in the following reaction.

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Textbook Question

Rationalize the rate difference in carbocation formation for the following molecules.

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Textbook Question

Which haloalkane would you expect to undergo the fastest SN1 reaction? Why?

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Textbook Question

Provide an arrow-pushing mechanism for the following alkane bromination. [Don't forget to use fishhook arrows to represent the movement of single electrons.]

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Textbook Question

Which proton, Ha or Hb, would you expect to have the lower pKa value?

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