11) Which of the following molecules would have the following potential energy diagram for rotation about its C2-C3 bond? Energy (kcal/mol) (A) 3 5 A 0 0.9 (B) 2 -180 5.0 -120 1.8 5.0 (A) butane (B) 2-methylbutane (C) 2,3-dimethylbutane (D) 2,2,3-trimethylbutane 12) How many levorotatory isomers are there of 0 torsional angle (C) 1 OH OH 0.9 60 ? 4.2 120 09 180 (D) 0

Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter5: Stereochemistry At Tetrahedral Centers
Section5.SE: Something Extra
Problem 70AP
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11) Which of the following molecules would have the following potential energy diagram
for rotation about its C2-C3 bond?
Energy (kcal/mol)
(A) 3
6
5
0
0.9
(B) 2
-180
5.0
-120
1.8
-60
5.0
(A) butane
(B) 2-methylbutane
(C) 2,3-dimethylbutane
(D) 2,2,3-trimethylbutane
12) How many levorotatory isomers are there of
0
torsional angle
OH
(C) 1
OH
0.9
60
?
4.2
120
09
180
(D) 0
Transcribed Image Text:11) Which of the following molecules would have the following potential energy diagram for rotation about its C2-C3 bond? Energy (kcal/mol) (A) 3 6 5 0 0.9 (B) 2 -180 5.0 -120 1.8 -60 5.0 (A) butane (B) 2-methylbutane (C) 2,3-dimethylbutane (D) 2,2,3-trimethylbutane 12) How many levorotatory isomers are there of 0 torsional angle OH (C) 1 OH 0.9 60 ? 4.2 120 09 180 (D) 0
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