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Stereochemistry and isomers


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1. determine the configuration of the molecules shown below.
CH3
CI
Br
F
Br
2. Not always is the H placed on the wedge, conveniently locating it 'in the back'. Assign the configuration of
the following compound.
H
J..iCH3
CI
Br
3.
A. Assign the configuration of the following compound.
B. B: name this compound fully using IUPAC rules.
CH3
Br
CH2OH

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4. What is the configuration of the amino acid shown below? Name this amino acid fully using the IUPAC rules.
NHat
H&C
CO2
5. How many stereoisomers are possible for a compound with two chiral carbons such as 2,3-dichloropentane?
draw ALL of them (using wedges & dashes) and assign the correct R or S configuration to BACH chiral carbon.
6. A: How many stereoisomers are possible for 2,3-dichlorobutane?! Draw them and assign the correct R of S
configuration to EACH chiral carbon.
B; draw each of the stereoisomers above into the Newman projection shown in the drawing.
consider this molecule:
CH3
CI
Br

Top Answer

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image.jpg

CHS
* Assign priority according to increasing atomic number
* View the molecule such that lowest priority group
is at the back
* draw a curve going from 1 - 2-3
Curve in clockwise direction = R...

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