Organic Chemistry
Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
Question
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Chapter 16, Problem 16.27P
Interpretation Introduction

Interpretation:

A mechanism for the given reaction (sulphur ylides react with ketone to give epoxides) has to be suggested.

Concept introduction:

The functional group in the aldehydes and Ketones are carbonyl group.

Electrophile: It is positively charged species which seeks for negative charge and hence accepts pair of electrons from negatively charged species (Nucleophiles) which results in the formation of chemical bond

Nucleophile: It is negatively charged species which seeks for positive charge and hence donate pair of electrons to positively charged species (electrophiles) which results in the formation of chemical bond.

Mechanism of the reaction is the step-by-step description of the process by which reactants are changed into products.

Curved arrows show the bonds that are formed and the bonds that are broken in a reaction.

Curved arrows used to understand a reaction mechanism.

Curved arrows are drawn to show how the electrons move as new covalent bonds are formed existing covalent bonds are broken.

Wittig reaction is a reaction in which a nucleophilic elimination occurs after nucleophilic addition reaction. In this reaction an aldehyde or ketone reacts with a triphenyl phosphonium ylide (Wittig reagent) to give an alkene and triphenylphosphine oxide.

The reaction can be represented as shown below,

Organic Chemistry, Chapter 16, Problem 16.27P , additional homework tip  1

Mechanism:

Organic Chemistry, Chapter 16, Problem 16.27P , additional homework tip  2

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Chapter 16 Solutions

Organic Chemistry

Ch. 16.8 - The given mechanism of transamination reaction is...Ch. 16.8 - Prob. DQCh. 16.8 - Prob. EQCh. 16.8 - The given mechanism of transamination reaction is...Ch. 16.9 - Predict the position of the following equilibrium.Ch. 16.9 - Draw a structural formula for the keto form of...Ch. 16.10 - Prob. 16.11PCh. 16.11 - What aldehyde or ketone gives these alcohols upon...Ch. 16.11 - Prob. 16.13PCh. 16 - Prob. 16.14PCh. 16 - Prob. 16.15PCh. 16 - The infrared spectrum of compound A, C6H12O, shows...Ch. 16 - Following are 1H-NMR spectra for compounds B...Ch. 16 - Draw structural formulas for the product formed by...Ch. 16 - Suggest a synthesis for the following alcohols...Ch. 16 - Show how to synthesize the following alcohol using...Ch. 16 - 1-Phenyl-2-butanol is used in perfumery. Show how...Ch. 16 - Prob. 16.22PCh. 16 - Draw structural formulas for (1) the...Ch. 16 - Show how to bring about the following conversions...Ch. 16 - Prob. 16.25PCh. 16 - Wittig reactions with the following -chloroethers...Ch. 16 - Prob. 16.27PCh. 16 - Prob. 16.28PCh. 16 - 5-Hydroxyhexanal forms a six-membered cyclic...Ch. 16 - Prob. 16.30PCh. 16 - Prob. 16.31PCh. 16 - Propose a mechanism to account for the formation...Ch. 16 - Prob. 16.33PCh. 16 - Prob. 16.34PCh. 16 - Show how to bring about the following conversion.Ch. 16 - A primary or secondary alcohol can be protected by...Ch. 16 - Prob. 16.37PCh. 16 - Prob. 16.38PCh. 16 - Prob. 16.39PCh. 16 - Prob. 16.40PCh. 16 - The following molecule belongs to a class of...Ch. 16 - When cis-2-decalone is dissolved in ether...Ch. 16 - Prob. 16.43PCh. 16 - Prob. 16.44PCh. 16 - The following bicyclic ketone has two -carbons and...Ch. 16 - Propose a mechanism for this reaction.Ch. 16 - The base-promoted rearrangement of an -haloketone...Ch. 16 - If the Favorskii rearrangement of...Ch. 16 - (R)-Pulegone, readily available from pennyroyal...Ch. 16 - (R)-Pulegone is converted to (R)-citronellic acid...Ch. 16 - Starting with cyclohexanone, show how to prepare...Ch. 16 - Show how to convert cyclopentanone to these...Ch. 16 - Prob. 16.53PCh. 16 - Prob. 16.54PCh. 16 - Prob. 16.55PCh. 16 - Following is the structural formula of Surfynol, a...Ch. 16 - Prob. 16.57PCh. 16 - Propose a mechanism for this isomerization.Ch. 16 - Starting with acetylene and 1-bromobutane as the...Ch. 16 - Prob. 16.60PCh. 16 - Prob. 16.61PCh. 16 - Prob. 16.62PCh. 16 - Prob. 16.63PCh. 16 - Prob. 16.64PCh. 16 - All rearrangements we have discussed so far have...Ch. 16 - In dilute aqueous base, (R)-glyceraldehyde is...Ch. 16 - Treatment of -D-glucose with methanol in the...Ch. 16 - Treating a Grignard reagent with carbon dioxide...Ch. 16 - Prob. 16.69PCh. 16 - Prob. 16.70PCh. 16 - Prob. 16.71PCh. 16 - Prob. 16.72PCh. 16 - Write the products of the following sequences of...Ch. 16 - Using your reaction roadmaps as a guide, show how...Ch. 16 - Using your reaction roadmaps as a guide, show how...Ch. 16 - Using your reaction roadmaps as a guide, show how...Ch. 16 - Using your reaction roadmaps as a guide, show how...Ch. 16 - Prob. 16.78PCh. 16 - Prob. 16.79PCh. 16 - Prob. 16.80PCh. 16 - Prob. 16.81P
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