just problem 5.20 please present a pair of enantiomers. Formulas Cand D represent identical orientations of theBr HHBrures A and B are nonsuperposable and represent a pair of enantiomers.a we write the new structure C (see below) and its mirror image D, however, thea is different. The two structures are superposable. This means that C and D do notsume compound:H HH HBrBrBrBrCDThe molecule represented by structure C (or D) is not chiral even though it containsWo chirality centers.• If a molecule has an internal plane of symmetry it is achiral.A meso compound is an achiral molecule that contains chirality centers and has aninternal plane of symmetry. Meso compounds are not optically active.Another test for molecular chirality is to construct a model (or write the structure) ofthe molecule and then test whether or not the model (or structure) is superposable on itsmirror image. If it is, the molecule is achiral. If it is not, the molecule is chiral.We have already carried out this test with structure C and found that it is achiral. We dibromobutane. This planecan also demonstrate that C is achiral in another way. Figure 5.15 shows that structure Chas an internal plane of rymmetry (Section 5.6).The following two problems relate to compounds A-D in the preceding paragraphs.FIGURE 5.15 The planeof symmetry of meso-2,3-divides the molecule into halvesthat are mirror images of eachother.Which of the following would be optically active?•PRACTICE PROBLEM 5.20(a) A pure sample of Ab) A pure sample of B(c) A pure sample of C(d) An equimolar mixture of A and B

enantiomers: non superimposable mirror images are called enantiomers, if enantiomers are equal…

Answered: just problem 5.20 please

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Chemistry

just problem 5.20 please

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter7: Cycloalkanes

Section: Chapter Questions

Problem 17E: Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of...

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Question

just problem 5.20 please

present a pair of enantiomers. Formulas Cand D represent identical orientations of the
Br H
H
Br
ures A and B are nonsuperposable and represent a pair of enantiomers.
a we write the new structure C (see below) and its mirror image D, however, the
a is different. The two structures are superposable. This means that C and D do not
sume compound:
H H
H H
Br
Br
Br
Br
C
D
The molecule represented by structure C (or D) is not chiral even though it contains
Wo chirality centers.
• If a molecule has an internal plane of symmetry it is achiral.
A meso compound is an achiral molecule that contains chirality centers and has an
internal plane of symmetry. Meso compounds are not optically active.
Another test for molecular chirality is to construct a model (or write the structure) of
the molecule and then test whether or not the model (or structure) is superposable on its
mirror image. If it is, the molecule is achiral. If it is not, the molecule is chiral.
We have already carried out this test with structure C and found that it is achiral. We dibromobutane. This plane
can also demonstrate that C is achiral in another way. Figure 5.15 shows that structure C
has an internal plane of rymmetry (Section 5.6).
The following two problems relate to compounds A-D in the preceding paragraphs.
FIGURE 5.15 The plane
of symmetry of meso-2,3-
divides the molecule into halves
that are mirror images of each
other.
Which of the following would be optically active?
•PRACTICE PROBLEM 5.20
(a) A pure sample of A
b) A pure sample of B
(c) A pure sample of C
(d) An equimolar mixture of A and B

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