(a)
Interpretation:
An explanation as to why the rate of iodination of optically active 1-phenyl-2-methyl-1-butanone in acetic acid/
Concept Introduction:
Halogenation reaction of
(b)
Interpretation:
An explanation as to why the rate of bromination and iodination of acetophenone are identical at a given acid concentration is to be stated.
Concept Introduction:
Halogenation reaction of ketone takes place at the
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Organic Chemistry
- Acid-catalyzed hydrolysis of the following epoxide gives a trans diol. Of the two possible trans diols, only one is formed. How do you account for this stereoselectivity?arrow_forwardWhen phenylacetaldehyde (C6H5CH2CHO) is dissolved in D2O with added DCl, the hydrogen atoms a to the carbonyl are gradually replaced by deuterium atoms. Write a mechanism for this process that involves enols as intermediates.arrow_forwardThe p-toluenesulfonate derived from (R)-2-octanol and p-toluenesulfonyl chloride was allowed to react with sodium benzenethiolate (C6H5SNa). Give the structure, including stereochemistry and the appropriate R or S descriptor, of the product.arrow_forward
- When (R)-6-bromo-2,6-dimethylnonane is dissolved in CH3OH, nucleophilic substitution yields an optically inactive solution. When the isomeric halide (R)-2-bromo-2,5-dimethylnonane is dissolved in CH3OH under the same conditions, nucleophilic substitution forms an optically active solution. Draw the products formed in each reaction, and explain why the difference in optical activity is observed.arrow_forwardWhen (ft)-6-bromo-2,6-dimethylnonane is dissolved in CH3OH, nucleophilic substitution yields an optically inactive solution. When the isomeric halide (fl)-2-bromo-2,5- dimethylnonane is dissolved in CH3OH under the same conditions, nucleophilic substitution forms an optically active solution. Draw the products formed in each reaction, and explain why the difference in optical activity is observed.arrow_forwardSketch and explain the IR, UV, mass, and NMR (1H and 13C) spectroscopy data of benzaldehyde.arrow_forward
- The following bicyclic ketone has two -carbons and three -hydrogens. When this molecule is treated with D2O in the presence of an acid catalyst, only two of the three -hydrogens exchange with deuterium. The -hydrogen at the bridgehead does not exchange. How do you account for the fact that two -hydrogens do exchange but the third does not? You will find it helpful to build models of the enols by which exchange of -hydrogens occurs.arrow_forwardProvide the reagent and mechanism for the transformation below. Explain in detail how the reaction conditions provide the given regioselectivity observed in the product.arrow_forwardRank the aryl halides in each group in order of increasing reactivity in nucleophilic aromatic substitution by an addition-elimination mechanism.a. chlorobenzene, p-uoronitrobenzene, m-uoronitrobenzeneb. 1-fluoro-2,4-dinitrobenzene, 1-fluoro-3,5-dinitrobenzene, 1-fluoro-3,4-dinitrobenzenec. 1-fluoro-2,4-dinitrobenzene, 4-chloro-3-nitrotoluene, 4-fluoro-3-nitrotoluenearrow_forward
- 8.b)Provide mechanisms for the following reactions:arrow_forwardWhen (R)-6-bromo-2,6-dimethylnonane is dissolved in CH3OH,nucleophilic substitution yields an optically inactive solution. When theisomeric halide (R)-2-bromo-2,5-dimethylnonane is dissolved in CH3OHunder the same conditions, nucleophilic substitution forms an opticallyactive solution. Draw the products formed in each reaction, and explainwhy the difference in optical activity is observed.arrow_forwarda. Compound X is benzene, Y is acetic anhydride acid. Complete the following scheme and determine Z! b. Determine which reagents except acetic acid anhydrides can replace Y!arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT