a)
Interpretation:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of phenylacetylene is to be drawn.
Concept introduction:
In the first step attack of the π electrons of the triple bond on the electrophilic Hg2+ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.
To draw:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of ethynylbenzene.
b)
Interpretation:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne is to be drawn.
Concept introduction:
In the first step attack of the π electrons of the triple bond on the electrophilic Hg2+ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.
To draw:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of propyne.
c)
Interpretation:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne is to be drawn.
Concept introduction:
In the first step attack of the π electrons of the triple bond on the electrophilic Hg2+ ion takes place to yield a mercury containing vinylic carbocation intermediate. In the second step nucleophilic attack of water takes place on the carbocation. A new C-O bond is formed leading to the formation of a protonated mercury containing enol. In the third step water abstracts a proton from the protonated enol to yield the organomercury intermediate.
To draw:
The electron pushing mechanism for the formation of the organo-mercury intermediate obtained during the mercury catalyzed hydration of 3-methyl-1-butyne.
Trending nowThis is a popular solution!
Chapter 9 Solutions
ORGANIC CHEMISTRY W/OWL
- A problem often encountered in the oxidation of primary alcohols to acids is that esters are sometimes produced as by-products. For example, oxidation of ethanol yields acetic acid and ethyl acetate: Propose a mechanism to account for the formation of ethyl acetate. Take into account the reversible reaction between aldehydes and alcohols:arrow_forwardBy taking into account electronegativity differences, draw the products formed by heterolysis of the carbon–heteroatom bond in each molecule. Classify the organic reactive intermediate as a carbocation or a carbanion.arrow_forwardExplain why pentane-2,4-dione forms two alkylation products (A and B) when the number ofequivalents of base is increased from one to two.arrow_forward
- single reaction sequence: a certain ketone undergoes alkylation to give new ketone, when reacted with a base and then an alkylating agent, 1-bromopropane. What is the structure of the final ketone product?arrow_forwardAcetal derivatives of aldehydes and ketones are prepared by an acid-catalyzed dehydration reaction with alcohols or diols. Using more pictures than words, draw a reaction and a mechanism that shows the formation of acetal.arrow_forwardWhich of the following molecules will undergo decarboxylation with mild heating?arrow_forward
- The major product of the given reaction has the molecular formula C10H16O3. Draw its structure in the most stable tautomeric form.arrow_forwardThe Stork reaction is a condensation reaction between an enamine donor and an α,β-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of formation of an enamine from a ketone, Michael addition to an α,β-unsaturated carbonyl compound, and hydrolysis of the enamine in dilute acid to regenerate the ketone. Consider the Stork reaction between cyclohexanone and propenal Draw the structure of the product of the enamine formed between cyclohexanone and dimethylamine. - Michael addition to an α,β-unsaturated carbonyl compound, and - hydrolysis of the enamine in dilute acid to regenerate the ketone.arrow_forwardDraw the major organic product formed in each of the following transition-metal catalyzed reactions:arrow_forward
- Draw reaction mechanisms with all reactants, arrows, intermediates, and products. Your mechanism must account for all the products if more than one product is formed. 4-methycyclohexanol with phosphoric acid H3PO4 to for 1-methycyclohexene, 3- methylcyclohexene and 4-methycyclohexenearrow_forwardA synthetic organic molecule, G, which contains both aldehyde and ether functional groups, is subjected to a series of reactions in a multi-step synthesis pathway. In the first step, G undergoes a Wittig reaction, leading to the formation of an alkene, H. Subsequently, H is treated with an ozone (O3) reagent followed by a reducing agent in an ozonolysis reaction, resulting in the formation of two different products, I and J. Considering the functional groups present in G and the nature of the reactions involved, what are the most probable structures or functional groups present in products I and J? A. I contains a carboxylic acid group, and J contains an aldehyde group. B. I contains a ketone group, and J contains an alcohol group. C. I and J both contain aldehyde groups. D. I contains an ester group, and J contains a ketone group. Don't use chat gpt.arrow_forwardPropose the synthesis for the following transformations.arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning