(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.
Want to see the full answer?
Check out a sample textbook solutionChapter 26 Solutions
EBK GENERAL CHEMISTRY
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY