Can someone explain the answers to 28, 29, and 30? The answers are B, A, A. I understand lindar catalyst makes cis alkenes and Na/NH3 makes trans alkenes but I dont understand how the second step of Br2, OsO4 influences the stereochemistry between the 2 . Will rate quickly if helpful. Thanks! complete this synthesis?-1. What are the of synthesis?(C) cat. by Br2/CC14028 What are the best reagents to(a)H.Br()BrH Br(B) Na/NH3 followed by Br2/CH2C12(D) Br/CH2C12 followed by H/Pt(A) 2 HBrOsO4NaNH3NMO. What are the products of this synthesis?H.HO,НО НHO(B)+ enantiomerH,()Но н+ enantiomerH.OH (@)H.Et(C) HHOМе НEt.,H,PO-30. What reagents are used in thissynthesis?HOH MeCH3(B) 1) H2/Lindlar's cat. 2) OsO&/NMO(D) 1) H2/Lindlar's cat. 2) O3 followed by Me,S(A) 1) Na/NH3 2) OsO4/NMO(C) 1) Na/NH3 2) O3 followed by Me2S

Answered: Can someone explain the answers to 28,…

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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Can someone explain the answers to 28, 29, and 30? The answers are B, A, A. I understand lindar catalyst makes cis alkenes and Na/NH3 makes trans alkenes but I dont understand how the second step of Br2, OsO4 influences the stereochemistry between the 2 . Will rate quickly if helpful. Thanks!

complete this synthesis?
-1. What are the of synthesis?
(C) cat. by Br2/CC14
028 What are the best reagents to
(a)
H.
Br
()
Br
H Br
(B) Na/NH3 followed by Br2/CH2C12
(D) Br/CH2C12 followed by H/Pt
(A) 2 HBr
OsO4
Na
NH3
NMO
. What are the products of this synthesis?
H.
HO,
НО Н
HO
(B)
+ enantiomer
H,
()
Но н
+ enantiomer
H.
OH (@)
H.
Et
(C) H
HO
Ме Н
Et.
,
H,
PO-30. What reagents are used in this
synthesis?
HO
H Me
CH3
(B) 1) H2/Lindlar's cat. 2) OsO&/NMO
(D) 1) H2/Lindlar's cat. 2) O3 followed by Me,S
(A) 1) Na/NH3 2) OsO4/NMO
(C) 1) Na/NH3 2) O3 followed by Me2S

Expert Solution

Step 1

Br₂/CH₂Cl₂ always yield two front and back side attack of Br which effect the stereochemistry of the reaction.

The free radical mechanism using Hbr in presence of hv does not effect the stereochemistry of the reaction.

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9781305957404

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