Identify the isomeric relationship between the molecules of each pair depicted below.  Your choices are dieastereomers, enantiomers, identical, or constitutional. Why are the molecules identical? What is going? Is the professor doing some bond rotation? How is she proving that the two molecules are IDENTICAL?

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter3: Stereoisomerism And Chirality
Section3.8: The Significance Of Chirality In The Biological World
Problem FQ: As stated, proteins are stereochemically pure because only a single enantiomer of each amino acid...
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Organic Chemistry 1

Here is the professor's solution to the problem. The assignment has been turned in and the answer key has been shared with the class. So, this is the official answer key. However, I do NOT understand the solution. Please explain the answer in a clear step-by-step fashion to me. Explain the answer provided in the image in a clear fashion and as if I did not know much about organic chemistry.

Question: Identify the isomeric relationship between the molecules of each pair depicted below.  Your choices are dieastereomers, enantiomers, identical, or constitutional. Why are the molecules identical? What is going? Is the professor doing some bond rotation? How is she proving that the two molecules are IDENTICAL?

I don't see it. Is she rotating the atoms, what exactly is she doing on this answer key?

reflections that are chirol
Br.
R; S
Hil
Br
both R/s stereoisomer Br
Br
I dentical
i dentical
H
`Br
meso
Stereo1s omr
has an in ternal
symmety mirorplane
meso form
2 w ill have
meso tool
°pp confiq at
S tereocenter" reflections"
Transcribed Image Text:reflections that are chirol Br. R; S Hil Br both R/s stereoisomer Br Br I dentical i dentical H `Br meso Stereo1s omr has an in ternal symmety mirorplane meso form 2 w ill have meso tool °pp confiq at S tereocenter" reflections"
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