25) Treatment of cyclopentene with peroxybenzoic acidA) results in oxidative cleavage of the ring to produce an acyclic compoundB) yields a meso epoxideC) yields an equimolar mixture of enantiomeric epoxidesD) gives the same product as treatment of cyclopentene with Os04E) none of the above26) Provide a detailed, step-by-step mechanism for the reaction shown below.НОBr2+HBrBr27) Provide a detailed, step-by-step mechanism for the reaction shown below.H3o*Но28) Provide the reagents necessary to complete the following transformation. The synthesis may involvemore than one step.Br?HO,29) Provide the reagents necessary to complete the following transformation. The synthesis may involvemore than one step.BrHO+enantiomer30) Provide the reagents necessary to convert 3-methyl-2-butanol to 2-methyl-2-butanol. The synthesismay involve more than one step.31) Both (E)- and (Z)-hex-3-ene are subjected to a hydroboration-oxidation sequence. How are theproducts from these two reactions related to each other?A) The (E)- and (Z)-isomers generate the same products but in differing amounts.B) The (E)- and (Z)-isomers generate the same products in exactly the same amounts.C) The products of the two isomers are related as constitutional isomers.D) The products of the two isomers are related as diastereomers.E) The products of the two isomers are not structurally related. 32) What alkene would yield the following products upon ozonolysis?СНЗCH2CH2CH2CНО + CH2033) Addition of Br2 to (E)-hex-3-ene producesA) a meso dibromideB) a mixture of enantiomeric dibromides which is optically activeC) a mixture of enantiomeric dibromides which is optically inactiveD) (Z)-3,4-dibromo-3-hexeneE) (E)-3,4-dibromo-3-hexene34) The mechanism for the acid-catalyzed hydration of alkenes is the reverse of the acid-catalyzeddehydration of alcohols. This illustrates the principle of35) Which of the following is the best reaction sequence to accomplish a Markovnikov addition of water toan alkene with minimal skeletal rearrangement?A) water + dilute acidB) water + concentrated acidC) oxymercuration-demercurationD) hydroboration-oxidationE) none of the above36) Which of the following additions to alkenes occur(s) specifically in an anti fashion?A) hydroboration-oxidationB) addition of Br2C) addition of H2D) addition of H20 in dilute acidE) both A and B37) Which of the following additions to alkenes occur(s) specifically in an syn fashion?A) dihydroxylation using Os04, H2O2B) addition of H2C) hydroborationD) addition of HCIE) А, В, and с38) HBr can be added to an alkene in the presence of peroxides (ROOR). What function does the peroxideserve in this reaction?A) nucleophileB) electrophileC) radical chain initiatorD) acid catalystE) solvent

25) Treatment of cyclopentene with peroxybenzoic acid A) results in oxidative cleavage of the ring to produce an acyclic compound B) yields a meso epoxide C) yields an equimolar mixture of enantiomeric epoxides D) gives the same product as treatment of cyclopentene with OsO4 E) none of the above 26) Provide a detailed, step-by-step mechanism for the reaction shown below. Но. Br2 + HBr Br

25) Treatment of cyclopentene with peroxybenzoic acid A) results in oxidative cleavage of the ring to produce an acyclic compound B) yields a meso epoxide C) yields an equimolar mixture of enantiomeric epoxides D) gives the same product as treatment of cyclopentene with OsO4 E) none of the above 26) Provide a detailed, step-by-step mechanism for the reaction shown below. Но. Br2 + HBr Br

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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21
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