Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 16.SE, Problem 29MP
Interpretation Introduction
Interpretation:
Given that sulfonation of
Concept introduction:
Sulfonation is a reversible process. Therefore the mechanism of desulfonation is exactly reverse of the sulfonation process.
To propose:
The mechanism for the desulfonation of benzenesulfonic acid to benzene on heating with H2SO4. The electrophile involved is to be identified.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
H₂C
ཏཱཏི 1 ནི
OH
1. Br2, PBг3
2. H₂O
H3C
OH
Br
The a-bromination of carbonyl compounds by Br2 in acetic acid is limited to aldehydes and ketones because acids, esters, and amides don't enolize to a sufficient extent. Carboxylic acids, however, can
be a-brominated by first converting the carboxylic acid to an acid bromide by treatment with PBr3. Following enolization of the acid bromide, Br2 reacts in an a-substitution reaction. Hydrolysis of the
acid bromide completes the reaction.
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Arrow-pushing Instructions
:0:
H3C
Br
Br
+
:::OH2
Br
H₂O
H3C
Br
за
Electrophilic aromatic substitution usually occurs at the 1-position of naphthalene, also called the a position. Predict the major products of the reactions of naphthalene with HNO3, H2SO4.
The following set of reactions convert phenylacetylene to butylbenzene.
Give the appropriate reagents for each step of the following reaction sequence.
Chapter 16 Solutions
Organic Chemistry
Ch. 16.1 - Prob. 1PCh. 16.2 - Propose a mechanism for the electrophilic...Ch. 16.2 - How many products might be formed on chlorination...Ch. 16.2 - When benzene is treated with D2SŪ4. deuterium...Ch. 16.3 - Prob. 5PCh. 16.3 - What is the major monosubstitution product from...Ch. 16.3 - Identify the carboxylic acid chloride that might...Ch. 16.4 - Rank the compounds in each of the following groups...Ch. 16.4 - Predict the major products of the following...Ch. 16.4 - Prob. 10P
Ch. 16.4 - Prob. 11PCh. 16.4 - Acetanilide is less reactive than aniline toward...Ch. 16.4 - Prob. 13PCh. 16.5 - At what position would you expect electrophilic...Ch. 16.5 - Show the major product(s) from reaction of the...Ch. 16.6 - The herbicide oxyfluorfen can be prepared by...Ch. 16.7 - Treatment of p-bromotoluene with NaOH at 300°C...Ch. 16.8 - Prob. 18PCh. 16.8 - Prob. 19PCh. 16.8 - Prob. 20PCh. 16.9 - Prob. 21PCh. 16.10 - Prob. 22PCh. 16.10 - Prob. 23PCh. 16.SE - Prob. 24VCCh. 16.SE - The following molecular model of a...Ch. 16.SE - Prob. 26VCCh. 16.SE - Prob. 27VCCh. 16.SE - Aromatic iodination can be carried out with a...Ch. 16.SE - Prob. 29MPCh. 16.SE - The carbocation electrophile in a Friede1-Crafts...Ch. 16.SE - Prob. 31MPCh. 16.SE - The nitroso group, —N=O, is one of the few...Ch. 16.SE - Triphenylmethane can be prepared by reaction of...Ch. 16.SE - Using resonance structures of the intermediates,...Ch. 16.SE - Benzene and alkyl -substituted benzenes can be...Ch. 16.SE - Prob. 36MPCh. 16.SE - Hexachlorophene, a substance used in the...Ch. 16.SE - Benzenediazonium carboxylate decomposes when...Ch. 16.SE - 4-Chloropyridine undergoes reaction with...Ch. 16.SE - Propose a mechanism to account for the following...Ch. 16.SE - In the Gatterman-Kochreaction, a formyl group...Ch. 16.SE - Treatment of p-tert-butylphenol with a strong acid...Ch. 16.SE - Benzyl bromide is converted into benzaldehyde by...Ch. 16.SE - Prob. 44MPCh. 16.SE - Prob. 45MPCh. 16.SE - Prob. 46APCh. 16.SE - Prob. 47APCh. 16.SE - Prob. 48APCh. 16.SE - Predict the major monoalkylation products you...Ch. 16.SE - Name and draw the major product(s) of...Ch. 16.SE - Prob. 51APCh. 16.SE - Prob. 52APCh. 16.SE - What product(s) would you expect to obtain from...Ch. 16.SE - Prob. 54APCh. 16.SE - How would you synthesize the following substances...Ch. 16.SE - Prob. 56APCh. 16.SE - Prob. 57APCh. 16.SE - Prob. 58APCh. 16.SE - Prob. 59APCh. 16.SE - Prob. 60APCh. 16.SE - Prob. 61APCh. 16.SE - Prob. 62APCh. 16.SE - Prob. 63APCh. 16.SE - How would you synthesize the following substances...Ch. 16.SE - Prob. 65APCh. 16.SE - Prob. 66APCh. 16.SE - Draw resonance structures of the intermediate...Ch. 16.SE - Prob. 68APCh. 16.SE - p-Bromotoluene reacts with potassium amide to give...Ch. 16.SE - Prob. 70APCh. 16.SE - Prob. 71APCh. 16.SE - Prob. 72APCh. 16.SE - Use your knowledge of directing effects, along...Ch. 16.SE - Identify the reagents represented by the letters...Ch. 16.SE - Phenols (ArOH) are relatively acidic, and the...Ch. 16.SE - Prob. 76APCh. 16.SE - Prob. 77APCh. 16.SE - Melamine, used as a fire retardant and a component...
Knowledge Booster
Similar questions
- What is the major substitution product for the following reaction? Show the mechanism for the reaction.arrow_forwardPredict the product formed in the nucleophilic aromatic substitution reaction between 1-chloro-2,4-dinitrobenzene and sodium methoxide (NaOCH3). Draw the mechanism for the reaction, showing why the product you have selected is formed.arrow_forwardOne frequently used method for preparing methyl esters is by reaction of carboxylic acids with diazomethane, CH2N2. The reaction occurs in two steps: (l) protonation of diazomethane by the carboxylic acid to yield methyldiazonium ion, CH3N2+, plus a carboxylate ion; and (2) reaction of the carboxylate ion with CH3N2+. (a) Draw two resonance structures of diazomethane, and account for step 1. (b) What kind of reaction occurs in step 2?arrow_forward
- Aldehydes and ketones react with thiols to yield thioacetals just as they react with alcohols to yield acetals. Predict the product of the following reaction, and propose a mechanism:arrow_forwardNonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.arrow_forwardWhen certain aromatic compounds are treated with formaldehyde (CH2O), and HCl, the CH2Cl group is introduced onto the ring. This reaction is known as chloromethylation. (a) Propose a mechanism for this example of chloromethylation. (b) The product of this chloromethylation can be converted to piperonal, which is used in perfumery and in artificial cherry and vanilla flavors. How might the CH2Cl group of the chloromethylation product be converted to a CHO group?arrow_forward
- Ethylene oxide is the starting material for the synthesis of 1,4-dioxane. Propose a mechanism for each step in this synthesis.arrow_forwardb) The Wolf-Kishner reduction is a reaction used in Organic Chemistry to convert carbonyl functionalities into methylene group. The reaction was used to convert an aldehyde or ketone to an alkane using hydrazine, base and thermal conditions. The mechanism begins with the attack of hydrazine of the aldehyde or ketone. Stage 1: The reaction of aldehyde/ketone with hydrazine to produce hydrazine Stage 2: Reaction with the base and heat to convert hydrozone to alkane Write the mechanism of the reaction.arrow_forwardWrite a mechanism that accounts for the formation of ethyl isopropyl ether as one of the products in the following reaction. CI OEt HCI EtOH Write the mechanism for step one of this reaction. Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. Write the mechanism for step two of this reaction (where the product of step one reacts with the solvent, ethanol). Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. Write the mechanism for the last step of this reaction (formation of ethyl isopropyl ether). Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. CI will act as the base in this reaction.arrow_forward
- Propose a structure for an aromatic hydrocarbon, C10H14, that can form only one C10H13Cl product on substitution of a hydrogen on the aromatic ring with chlorine.arrow_forwardH3C OH OH H+ CH3 Esters can be synthesized by an acid-catalyzed nucleophilic acyl substitution between an alcohol and a carboxylic acid; this process is called the Fischer esterification reaction. Because the alcohol oxygen is a poor nucleophile, the carbonyl carbon is made a better electrophile by protonation of the carbonyl oxygen. The steps of the synthesis are all reversible. The reaction is generally driven to completion by using an excess of the liquid alcohol as a solvent, or by distilling off the product as it forms. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions CIX 10-4 H₂O CH3 H₂O CH3arrow_forwarda) Reaction of 2-methyl propene with methanol in acid-catalyzed medium step by step showing the mechanism, show the product to be formed. b) Starting from benzene, synthesize the following substances by choosing the appropriate reagents. 1) m-chloro benzoic acid 2) p-nitro phenolarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning