
(a)
Interpretation:
The R or S configuration to each of the chiral C atom in the given structure is to be assigned.
Concept introduction:
Enantiomers are optical isomers which can rotate the plane polarized light either clockwise or anticlockwise. These molecules must have at least one chiral C atom which is bonded with four different groups. They are assigned by R and S configuration. The R/S naming follows the Cahn-Ingold-Prelog Rules for naming the enantiomer as R or S-enantiomer. According to Cahn-Ingold-Prelog Rules assign the numbers from 1 to 4 to the groups bonded with chiral C atom on the basis of their molar mass. The essential condition is that the 4th group or atom must be below the plane means with dash line. If 1(2(3 is clockwise it will be R-configuration and if it is anticlockwise it will be S-configuration.
If the 4th number group is in plane then follow these steps.
- Swap the 4 group with the group with dash line
- Assign R/S configuration with clockwise or anticlockwise movement
- Flip the configuration to get the real configuration.
If the 4th number group is in above the plane shown by wedge line then follow these steps.
- Swap the 4 group with the group with dash line.
- Assign R/S configuration with clockwise or anticlockwise movement.
(b)
Interpretation:
The R or S configuration to each of the chiral C atom in the given structure should be assigned.
Concept introduction:
Enantiomers are optical isomers which can rotate the plane polarized light either clockwise or anticlockwise. These molecules must have at least one chiral C atom which is bonded with four different groups. They are assigned by R and S configuration. The R/S naming follows the Cahn-Ingold-Prelog Rules for naming the enantiomer as R or S-enantiomer. According to Cahn-Ingold-Prelog Rules assign the numbers from 1 to 4 to the groups bonded with chiral C atom on the basis of their molar mass. The essential condition is that the 4th group or atom must be below the plane means with dash line. If 1(2(3 is clockwise it will be R-configuration and if it is anticlockwise it will be S-configuration.
If the 4th number group is in plane then follow these steps.
- Swap the 4 group with the group with dash line
- Assign R/S configuration with clockwise or anticlockwise movement
- Flip the configuration to get the real configuration.
If the 4th number group is in above the plane shown by wedge line then follow these steps.
- Swap the 4 group with the group with dash line.
- Assign R/S configuration with clockwise or anticlockwise movement.

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Chapter 26 Solutions
General Chemistry: Principles and Modern Applications, Loose Leaf Version (11th Edition)
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- Provide the reasonable steps to achieve the following synthesis.arrow_forwardWhen anisole is treated with excess bromine, the reaction gives a product which shows two singlets in 1H NMR. Draw the product.arrow_forward(ii) Draw a reasonable mechanism for the following reaction: CI NaOH heat OH (hint: SNAr Reaction) :arrow_forward
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