Organic Chemistry - Standalone book
10th Edition
ISBN: 9780073511214
Author: Francis A Carey Dr., Robert M. Giuliano
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 9, Problem 37P
The oxidation step involves an enol intermediate. Using Mechanism
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1.Treatment of 3-methyl-2-butanol with hydrogen chloride yielded only a trace amount of 2-chloro-3-methylbutane. An isomeric chloride was isolated in 97% yield. Explain why an isomeric compound is formed instead, andsuggest a reasonable structure for this product.
2) Acid-catalyzed hydration of 2-Methyl-1-butene yields two alcohols. The major product does not undergo oxidation, while the minor product will undergo oxidation. Explain why, by showing the structures of the products.
3) The Williamson ether synthesis cannot be used to prepare tert-butyl phenyl ether. Explain why this method cannot be used in this case.
4) Show the structure of the main product when 2,2-dimethyloxirane reacts in methanol. (a) in the presence of an acid, (b) with added sodium methoxide.
Choose the correct product and Furnish a step-by-step electron-flow diagram that elucidates the transformation of the product from the enol generated in the second step (that is, illustrate the mechanism by which the enol is converted into a ketone). Explain in details
How many stereoisomers are obtained from the reaction of 3-methyl-2-butanone with each of the following organometallic reagents followed by the addition of dilute acid? Name each stereoisomer.
ethyllithium
methylmagnesium bromide
Chapter 9 Solutions
Organic Chemistry - Standalone book
Ch. 9.1 - Prob. 1PCh. 9.2 - Prob. 2PCh. 9.4 - How do bond distances and bond strengths change...Ch. 9.5 - Complete each of the following equations to show...Ch. 9.6 - Prob. 5PCh. 9.6 - Which of the alkynes of molecular formula C5H8 can...Ch. 9.7 - Give the structures of three isomeric dibromides...Ch. 9.7 - Prob. 8PCh. 9.9 - Write a series of equations showing how you could...Ch. 9.9 - Write a series of equations showing how to prepare...
Ch. 9.10 - Prob. 11PCh. 9.11 - Give the structure of the enol formed by hydration...Ch. 9.11 - Prob. 13PCh. 9.13 - Prob. 14PCh. 9.14 - Prob. 15PCh. 9 - Provide the IUPAC name for each of the following...Ch. 9 - Prob. 17PCh. 9 - All compounds in Problem 9.17 are isomers except...Ch. 9 - Prob. 19PCh. 9 - Write structural formulas for all the alkynes of...Ch. 9 - Prob. 21PCh. 9 - Prob. 22PCh. 9 - The alkane formed by hydrogenation of...Ch. 9 - Write the structure of the major organic product...Ch. 9 - Write the structure of the major organic product...Ch. 9 - When 2-heptyne was treated with aqueous sulfuric...Ch. 9 - Prob. 27PCh. 9 - Prob. 28PCh. 9 - Prob. 29PCh. 9 - Show by writing appropriate chemical equations how...Ch. 9 - Show by writing appropriate chemical equations how...Ch. 9 - Diphenylacetylene can be synthesized by the double...Ch. 9 - (Z)-9-tricosene [ (Z)-CH3(CH2)7CH=CH(CH2)12CH3 ]...Ch. 9 - Prob. 34PCh. 9 - Prob. 35PCh. 9 - Prob. 36PCh. 9 - Alkynes undergo hydroboration to give...Ch. 9 - Prob. 38DSPCh. 9 - Prob. 39DSPCh. 9 - Prob. 40DSPCh. 9 - Prob. 41DSPCh. 9 - Thinking Mechanistically About Alkynes The...
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- Enamines normally react with methyl iodide to give two products: one arising from alkylation at nitrogen and the second arising from alkylation at carbon. For example, Heating the mixture of C-alkylation and N-alkylation products gives only the product from C-alkylation. Propose a mechanism for this isomerization.arrow_forwardAldehydes and ketones undergo acid-catalyzed reaction with alcohols to yield hemiacetals, compounds that have one alcohol-like oxygen and one ether-like oxygen bonded to the same carbon. Further reaction of a hemiacetal with alcohol then yields an acetal, a compound that has two ether-like oxygens bonded to the same carbon. (a) Show the structures of the hemiacetal and acetal you would obtain by reaction of cyclohexanone with ethanol. (b) Propose a mechanism for the conversion of a hemiacetal into an acetal.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_forward
- Ethylene oxide is the starting material for the synthesis of 1,4-dioxane. Propose a mechanism for each step in this synthesis.arrow_forwardWittig reactions with the following -chloroethers can be used for the synthesis of aldehydes and ketones. (a) Draw the structure of the triphenylphosphonium salt and Wittig reagent formed from each chloroether. (b) Draw the structural formula of the product formed by treating each Wittig reagent with cyclopentanone. Note that the functional group is an enol ether or, alternatively, a vinyl ether. (c) Draw the structural formula of the product formed on acid-catalyzed hydrolysis of each enol ether from part (b).arrow_forwardGrignard reagent is a versatile tool in synthetic organic chemistry. Using bromocyclopentane as a starting material, show how a Grignard reagent, X, is synthesized. Reaction of X with water produces compound Y while treatment in carbon dioxide followed by hydrolysis forms compound Z. 3-methyl-2butanone reacts with X and hydrolyses to yield compound AA. Draw the structural formulae of compounds Y, Z and AA and write the chemical equations respectively.arrow_forward
- Because bromocyclohexane is a secondary alkyl halide, both cyclohexanol and cyclohexene are formed when the alkyl halide reacts with hydroxide ion. Suggest a method to synthesize cyclohexanol from bromocyclohexane that forms little or no cyclohexene.arrow_forwardDraw the structural formula of the enol formed in the following alkyne hydration reaction and then draw the structural formula of the carbonyl compound with which this enol is in equilibrium.arrow_forwardDescribe how 3-methyl-1-phenyl-3-pentanol can be prepared from benzene. You can use any inorganic reagents and solvents, and any organic reagents provided they contain no more than two carbons.arrow_forward
- Account for the fact that hydroperoxidation of ethers is regioselective (i.e., reaction occurs preferentially at a carbon adjacent to the ether oxygen).arrow_forwardDescribe how 1-ethylcyclohexanol can be prepared from cyclohexane. You can use any inorganic reagents, any solvents, and any organic reagents as long as they contain no more than two carbons.arrow_forwardDiphenylacetylene can be synthesized by the double dehydrohalogenation of 1,2-dibromo-1,2-diphenylethene. The sequence starting from (E)-1,2-diphenylethene consists of bromination to give the dibromide, followed by dehydrohalogenation to give a vinylic bromide, then a second dehydrohalogenation to give diphenylacetylene.(a) What is the structure, including stereochemistry, of the vinylic bromide?(b) If the sequence starts with (Z)-1,2-dibromo-1,2-diphenylethene, what is (are) the structure(s) of the intermediate dibromide(s)? What is the structure of the vinylic bromide?arrow_forward
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