Textbook Question
Identify the alkene that would react with Ti(OiPr)₄, (+) -diethyltartrate, and t-butylhydroperoxide to give the following chiral, nonracemic epoxides.
(c)
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Ch. 9 - Alkenes II: Oxidation and Reduction
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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Table of contents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases: Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
Chapter 8, Problem 43b
Calculate the oxidation number for the indicated carbons.
(b) 
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Identify the carbon atom for which you need to calculate the oxidation number. In organic molecules, this is often indicated by a specific label or context in the problem.
Determine the number of bonds the carbon atom forms with more electronegative atoms (such as oxygen, nitrogen, or halogens). Each bond to a more electronegative atom increases the oxidation state by +1.
Determine the number of bonds the carbon atom forms with less electronegative atoms (such as hydrogen). Each bond to a less electronegative atom decreases the oxidation state by -1.
Consider any bonds the carbon atom forms with other carbon atoms. These typically do not affect the oxidation state, as the electronegativity is the same.
Sum the contributions from each bond to determine the oxidation number of the carbon atom. Remember that the oxidation number is a formalism and may not represent the actual charge on the atom.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Oxidation Number
The oxidation number is a theoretical charge assigned to an atom in a molecule, reflecting its electron control relative to a neutral atom. It helps in determining the electron transfer in redox reactions. For carbon, it is calculated by considering the electronegativity of atoms bonded to it and assigning electrons accordingly.
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Strong oxidizing agents
Electronegativity
Electronegativity is the tendency of an atom to attract electrons towards itself in a chemical bond. In organic chemistry, it is crucial for determining the oxidation number, as electrons are assigned to the more electronegative atom in a bond. Carbon's electronegativity is intermediate, affecting its oxidation state in compounds.
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Redox Reactions
Redox reactions involve the transfer of electrons between atoms, leading to changes in oxidation states. Understanding these reactions is essential for calculating oxidation numbers, as they indicate how electrons are distributed in a molecule. In organic chemistry, redox processes are key in metabolic pathways and synthetic transformations.
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Related Practice
Textbook Question
Calculate the oxidation number for the indicated carbons.
(c)
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Textbook Question
Calculate the oxidation number for the indicated carbons.
(a)
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Textbook Question
Determine whether the following reactions are redox reactions. If they are, identify whether the molecule has been oxidized or reduced.
(a)
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Textbook Question
The chiral catalyst (R)-BINAP(COD)RhOTf was used in a hydrogenation reaction as part of the synthesis of fragment C of indinavir. Using the same alkene, predict the product that would be obtained if (S)-BINAP(COD)RhOTf were used instead.
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Textbook Question
Calculate the oxidation number for the indicated carbons.
(d)
1
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