Interpretation:
The alkyl beromide shown is prepared by treating (S)-2-pentanol with PBr3. The name of the alkyl bromide and its stereochemistry whether R or S are to be stated. Further whether there is any change in stereochemistry during the course of the reaction is also to be stated.
Concept introduction:
The
For assigning the configuration as R or S, the four groups attached to the chiral carbon are arranged in the order of preference based on the sequence rules. The molecule is viewed by orienting the molecule in such a way that the group of lowest ranking points away from the observer. If the arrangement of the groups of first, second and third ranking (1->2->3-) is clockwise R configuration is assigned. If their arrangement is anti-clockwise then S configuration is assigned.
If both the reactants and products of a reaction have same configuration the reaction is said to occur with retention in stereochemistry. If they have different configurations the reaction is said to occur with inversion in stereochemistry.
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Chapter 10 Solutions
Organic Chemistry
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- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning