Textbook Question
Draw the organic products you would expect to isolate from the following reactions (after hydrolysis).
(j)
1
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Ch.10 - Structure and Synthesis of Alcohols
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 10, Problem 36c,d
Draw the organic products you would expect to isolate from the following reactions (after hydrolysis).
(c) 
(d) 
Verified step by step guidance1
Step 1: Analyze the reaction in (i). The reaction involves a Grignard reagent (ethylmagnesium iodide) reacting with benzaldehyde. Grignard reagents are nucleophiles that attack the electrophilic carbonyl carbon in aldehydes or ketones.
Step 2: In (i), the ethyl group from the Grignard reagent will add to the carbonyl carbon of benzaldehyde, forming a tetrahedral intermediate. This intermediate will then undergo hydrolysis during the work-up step to yield the final alcohol product.
Step 3: For reaction (ii), the starting material is a cyclic ketone (cyclopentanone) with a hydroxyl group. The reaction involves one equivalent of methylmagnesium iodide (CH₃MgI). The Grignard reagent will attack the carbonyl carbon of the ketone, forming a tetrahedral intermediate.
Step 4: After the Grignard reagent reacts with the ketone in (ii), hydrolysis will convert the intermediate into an alcohol. Since only one equivalent of CH₃MgI is used, the reaction will stop at the alcohol stage without further reaction.
Step 5: Draw the final organic products for both reactions. For (i), the product will be a secondary alcohol with the ethyl group added to the benzene ring. For (ii), the product will be a tertiary alcohol with a methyl group added to the cyclopentanone structure.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Grignard Reagents
Grignard reagents are organomagnesium compounds that react with electrophiles, such as carbonyls, to form new carbon-carbon bonds. They are highly reactive and can add to carbonyl groups, leading to the formation of alcohols after hydrolysis. Understanding their reactivity is crucial for predicting the products of reactions involving carbonyl compounds.
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Carbonation of Grignard Reagents
Nucleophilic Addition
Nucleophilic addition is a fundamental reaction mechanism in organic chemistry where a nucleophile attacks an electrophilic carbon atom, typically in carbonyl compounds. This process results in the formation of a tetrahedral intermediate, which can lead to various products depending on subsequent reactions, such as hydrolysis in the case of Grignard reactions.
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Hydrolysis of Grignard Products
Hydrolysis of Grignard products involves the reaction of the organomagnesium compound with water or an aqueous acid, resulting in the formation of alcohols. This step is essential for converting the intermediate products formed during the nucleophilic addition into stable alcohols, which are often the final products of Grignard reactions with carbonyl compounds.
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Related Practice
Textbook Question
Draw the organic products you would expect to isolate from the following reactions (after hydrolysis).
(a)
(b)
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Textbook Question
Draw the organic products you would expect to isolate from the following reactions (after hydrolysis).
(f)
(g)
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Textbook Question
Draw the organic products you would expect to isolate from the following reactions (after hydrolysis).
(k)
(l)
1
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Textbook Question
Predict which member of each group is most soluble in water, and explain the reasons for your predictions.
a. butan-1-ol, pentan-1-ol, or propan-2-ol
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Textbook Question
Predict which member of each group is most soluble in water, and explain the reasons for your predictions.
b. chlorocyclohexane, cyclohexanol, or cyclohexane-1,2-diol
1
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