20. Select the set of reagents/conditions that will most likely afford the followingorganic transformation:a. NaOEt, heatb. HCl, peroxidec. KOtBu, heatd. EtOH, heat21. Select the proper reaction sequence to convert benzene to 3-butyl-1-bromobenzene in a reasonable yield.a. 1. Brz/FeBr3; 2. butanoyl chloride/AlCl3; 3. Hg(Zn), HCl(aq)b. 1. Butanoyl chloride/AlCl3; 2. Brz/FeBr3; Hg(Zn), HCl(aq)c. 1. HNO3/H2SO4 (aq); 2. butanoyl chloride/AlCl3; 3. HBr(aq)/heatd. 1. Butanoyl chloride/AIC13; 2. HNO3/H2SO4(aq); 3. HBr(aq)/heatС.22. Consider the following nucleophilic acyl substitution reaction. Which of thefollowing statements most accurately reflects the mechanism?HOonbloa. overall exergonic reaction; nucleophilic attack followed by loss of leavinggroup; loss of leaving group step is rate-limitingb. overall exergonic reaction; nucleophilic attack followed by loss of leavinggroup; nucleophilic attack is rate limitingc. overall endergonic reaction; nucleophilic attack followed by loss of leavinggroup; loss of leaving group is rate limitingd. neither exergonic nor endergonic reaction; nucleophilic attack followed byloss of leaving group; nucleophilic attack is rate limiting.23. If the chemical shift (8) for a proton is 9.124 ppm in a 40 MHz NMRspectrometer, then the chemical shift for the same proton in an 800 MHzNMR spectrometer would be:а. 3.637b. 7.272C. 9.124d. 10.982

(20) When an alkene is treated with hydrogen chloride, (HCl) then addition take place According to…

Answered: 20. Select the set of…

20. Select the set of reagents/conditions that will most likely afford the following organic transformation: a. NaOEt, heat b. HCI, peroxide c. KOtBu, heat d. ELOH, heat

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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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

Question

100%

20. Select the set of reagents/conditions that will most likely afford the following
organic transformation:
a. NaOEt, heat
b. HCl, peroxide
c. KOtBu, heat
d. EtOH, heat
21. Select the proper reaction sequence to convert benzene to 3-butyl-1-
bromobenzene in a reasonable yield.
a. 1. Brz/FeBr3; 2. butanoyl chloride/AlCl3; 3. Hg(Zn), HCl(aq)
b. 1. Butanoyl chloride/AlCl3; 2. Brz/FeBr3; Hg(Zn), HCl(aq)
c. 1. HNO3/H2SO4 (aq); 2. butanoyl chloride/AlCl3; 3. HBr(aq)/heat
d. 1. Butanoyl chloride/AIC13; 2. HNO3/H2SO4(aq); 3. HBr(aq)/heat
С.
22. Consider the following nucleophilic acyl substitution reaction. Which of the
following statements most accurately reflects the mechanism?
HO
onblo
a. overall exergonic reaction; nucleophilic attack followed by loss of leaving
group; loss of leaving group step is rate-limiting
b. overall exergonic reaction; nucleophilic attack followed by loss of leaving
group; nucleophilic attack is rate limiting
c. overall endergonic reaction; nucleophilic attack followed by loss of leaving
group; loss of leaving group is rate limiting
d. neither exergonic nor endergonic reaction; nucleophilic attack followed by
loss of leaving group; nucleophilic attack is rate limiting.
23. If the chemical shift (8) for a proton is 9.124 ppm in a 40 MHz NMR
spectrometer, then the chemical shift for the same proton in an 800 MHz
NMR spectrometer would be:
а. 3.637
b. 7.272
C. 9.124
d. 10.982

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