Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Textbook Question
Chapter 11.3, Problem 7P
Organic solvents like benzene, ether, and chloroform are neither protic nor strongly polar. What effect would you expect these solvents to have on the reactivity of a nucleophile in SN2 reaction?
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Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Draw all the oissuvke resonance forms of methoxybenzene, including the hybrid Based on the structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.
When performing a nucleophilic substitution reaction and not knowing the structure of the starting material or product, how can you form a method to determine whether the reaction proceeds via an SN1 or SN2 mechanism?
The reaction of an amine with an alkyl halide gives an ammonium salt. The rate of this SN2 reaction is sensitive to the polarity of the solvent. Draw an energy diagram for this reaction in a nonpolar solvent and another in a polar solvent. Consider the nature of the transition state, and explain why this reaction should be sensitive to the polarity of the solvent. Predict whether it will be faster or slower in a more polar solvent.
Chapter 11 Solutions
Organic Chemistry
Ch. 11.1 - Prob. 1PCh. 11.2 - Prob. 2PCh. 11.2 - Prob. 3PCh. 11.3 - Prob. 4PCh. 11.3 - Prob. 5PCh. 11.3 - Rank the following compounds in order of their...Ch. 11.3 - Organic solvents like benzene, ether, and...Ch. 11.4 - Prob. 8PCh. 11.4 - Prob. 9PCh. 11.4 - Prob. 10P
Ch. 11.5 - Rank the following substances in order of their...Ch. 11.5 - 3-Bromo-1-butene and 1-bromo-2-butene undergo SN1...Ch. 11.5 - Prob. 13PCh. 11.6 - Review the mechanism of geraniol biosynthesis...Ch. 11.7 - Prob. 15PCh. 11.7 - What alkyl halides might the following alkenes...Ch. 11.8 - Prob. 17PCh. 11.8 - Prob. 18PCh. 11.9 - Prob. 19PCh. 11.12 - Prob. 20PCh. 11.SE - Prob. 21VCCh. 11.SE - From what alkyl bromide was the following alkyl...Ch. 11.SE - Prob. 23VCCh. 11.SE - Prob. 24VCCh. 11.SE - Prob. 25MPCh. 11.SE - Prob. 26MPCh. 11.SE - Prob. 27MPCh. 11.SE - Prob. 28MPCh. 11.SE - Prob. 29MPCh. 11.SE - Prob. 30MPCh. 11.SE - Prob. 31MPCh. 11.SE - Prob. 32MPCh. 11.SE - Metabolism of S-adenosylhomocysteine (Section...Ch. 11.SE - Reaction of iodoethane with CN- yields a small...Ch. 11.SE - One step in the urea cycle for ridding the body of...Ch. 11.SE - Prob. 36MPCh. 11.SE - Prob. 37MPCh. 11.SE - Propose a mechanism for the following reaction, an...Ch. 11.SE - Prob. 39APCh. 11.SE - The following Walden cycle has been carried out....Ch. 11.SE - Prob. 41APCh. 11.SE - Which reactant in each of the following pairs is...Ch. 11.SE - Prob. 43APCh. 11.SE - Prob. 44APCh. 11.SE - Prob. 45APCh. 11.SE - Prob. 46APCh. 11.SE - Prob. 47APCh. 11.SE - Prob. 48APCh. 11.SE - Propose structures for compounds that fit the...Ch. 11.SE - What products would you expect from the reaction...Ch. 11.SE - Prob. 51APCh. 11.SE - Prob. 52APCh. 11.SE - Prob. 53APCh. 11.SE - Prob. 54APCh. 11.SE - Prob. 55APCh. 11.SE - Order each of the following sets of compounds with...Ch. 11.SE - Order each of the following sets of compounds with...Ch. 11.SE - Prob. 58APCh. 11.SE - Prob. 59APCh. 11.SE - Ethers can often be prepared by SN2 reaction of...Ch. 11.SE - Show the stereochemistry of the epoxide (see...Ch. 11.SE - Prob. 62APCh. 11.SE - In addition to not undergoing substitution...Ch. 11.SE - The tosylate of (2R, 3S)-3-phenyl-2-butanol...Ch. 11.SE - Prob. 65APCh. 11.SE - Prob. 66APCh. 11.SE - Prob. 67APCh. 11.SE - Prob. 68APCh. 11.SE - Prob. 69APCh. 11.SE - (S)-2-Butanol slowly racemizes on standing in...Ch. 11.SE - Reaction of HBr with (R)-3-methyl-3-hexanol leads...Ch. 11.SE - Treatment of 1-bromo-2-deuterio-2-phenylethane...Ch. 11.SE - Prob. 73APCh. 11.SE - Prob. 74APCh. 11.SE - In light of your answer to Problem 11-74, explain...Ch. 11.SE - Prob. 76APCh. 11.SE - Compound X is optically inactive and has the...Ch. 11.SE - When a primary alcohol is treated with...Ch. 11.SE - Prob. 79APCh. 11.SE - Amines are converted into alkenes by a two-step...Ch. 11.SE - The antipsychotic drug flupentixol is prepared by...
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- p-Fluoronitrobenzene is more reactive toward hydroxide ion than is p-chloronitrobenzene. What does this tell you about the rate-determining step for nucleophilic aromatic substitution?arrow_forwardRank the nucleophiles in following group in order of increasing nucleophilicity. H2O, −OH, CH3CO2-arrow_forwardDescribe the mechanism by which benzene is converted to bromobenzene (C6H5Br) on treatment with a mixture of bromine and iron (III) bromide (Br2/FeBr3). Your answer should illustrate how the electrophile (Br*) is formed from the Br₂/FeBr3 and how it is involved in the electrophilic substitution of the aromatic ring.arrow_forward
- Help ASAP Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Do this by writing all the possible resonance forms for methoxybenzene, including the hybrid. Based on your structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack; (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.arrow_forwardb) Listed below are several hypothetical nucleophilic substitution reactions. None is synthetically useful because the product indicated is not formed at an appreciable rate. In each case provide an explanation for the failure of the reaction to take place as indicated. OMe HO + OMe + OH HO + CH; OHarrow_forwardIn an SN2 reaction between 2-chlorobutane and iodide ion, what happens to the rate of the reaction if: (a) the concentration of 2-chlorobutane is doubled? (b) the concentration of iodide is doubled?arrow_forward
- Triethyloxonium tetrafluoroborate, (CH3CH2)3O+ BF4 −, is a solid with melting point 91–92 °C. Show how this reagent can transfer an ethyl group to a nucleophile (Nuc:−) in an SN2 reaction. What is the leaving group? Why might this reagent be preferred to using an ethyl halide?arrow_forwardDraw the product of nucleophile substitution , and determine the likely mechanism ( SN1 or SN2arrow_forwardAn electrostatic potential map of boron trifluoride is shown. Is BF3 likely to be a ucleophile or an electrophile? Draw a Lewis structure for BF3, and explain your answer. BF3arrow_forward
- Consider the following SN1 reaction: (CH3)3CBR + H2O → (CH3)3COH + HBr What is the effect of doubling both the t-butyl bromide and water concentrations on the rate of the reaction? O doubles the rate O quadruples the rate O triples the rate O halves the rate O no change O quarters the rate O 1/16th the ratearrow_forwardExplain the effect of the -OH group on the relative nucleophilicity of phenol vs. benzene. Describe the importance of both resonance and inductive effects if present.arrow_forwardRank the following reactions in order of increasing nucleophile strength: Cl-, H2O, CH3-, H2S, HS-, I-arrow_forward
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