Textbook Question
Classify each reaction as an oxidation, a reduction, or neither.
(j)
(k)
(l)
949
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Ch.11 - Reactions 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 11, Problem 1d,e,f
Classify each reaction as an oxidation, a reduction, or neither.
(d) 
(e) 
(f) 
Verified step by step guidance1
Step 1: Analyze the first reaction. The starting material is ethanol (CH₃CH₂OH), which is reduced to ethane (CH₃CH₃) using LiAlH₄/TiCl₄. Reduction involves the gain of hydrogen or the loss of oxygen. Here, the hydroxyl group (-OH) is removed, and the molecule gains hydrogen atoms, classifying this reaction as a reduction.
Step 2: Examine the second reaction. The starting material is cyclohexene, which reacts with bromine (Br₂) to form a dibromocyclohexane product with two bromine atoms added across the double bond. This is an addition reaction, but it does not involve a change in oxidation state (no gain or loss of hydrogen or oxygen). Therefore, this reaction is classified as neither oxidation nor reduction.
Step 3: Evaluate the third reaction. The starting material is cyclopentanone, which reacts with methanol (CH₃OH) under acidic conditions to form an acetal product. This reaction involves the formation of a new bond between the carbonyl carbon and the methanol molecules, but there is no change in oxidation state. Thus, this reaction is classified as neither oxidation nor reduction.
Step 4: Understand the concepts of oxidation and reduction in organic chemistry. Oxidation typically involves the loss of hydrogen or the gain of oxygen, while reduction involves the gain of hydrogen or the loss of oxygen. Reactions that do not involve these changes are classified as neither.
Step 5: Summarize the classifications: (d) Reduction, (e) Neither, (f) Neither.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Oxidation and Reduction
Oxidation and reduction are fundamental concepts in organic chemistry that describe the transfer of electrons between species. Oxidation involves the loss of electrons or an increase in oxidation state, while reduction is the gain of electrons or a decrease in oxidation state. Understanding these processes is crucial for classifying reactions correctly.
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Distinguishing between Oxidation and Reduction
Reagents in Organic Reactions
Reagents such as lithium aluminum hydride (LiAlH4) and titanium tetrachloride (TiCl4) are commonly used in organic reactions to facilitate transformations. LiAlH4 is a strong reducing agent that can convert alcohols to alkanes by removing the hydroxyl group and replacing it with hydrogen. Recognizing the role of these reagents helps in predicting the outcome of the reaction.
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Functional Group Transformations
Functional group transformations involve changing one functional group into another during a chemical reaction. In the provided reaction, the hydroxyl group (-OH) of an alcohol is transformed into a hydrogen atom, resulting in the formation of an alkane. Understanding these transformations is essential for predicting the products of organic reactions.
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Related Practice
Textbook Question
Classify each reaction as an oxidation, a reduction, or neither.
(g)
(h)
(i)
1787
views
Textbook Question
Predict the products of the reactions of the following compounds with:
1. chromic acid or excess sodium hypochlorite with acetic acid.
2. PCC or NaOCl (1 equivalent) with TEMPO.
a. cyclohexanol
b. 1-methylcyclohexanol
c. cyclopentylmethanol
1908
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Textbook Question
Classify each reaction as an oxidation, a reduction, or neither.
(a)
(b)
(c)
1616
views