Two stereo isomers are obtained from the reaction of HBr with (S)-4-bromo-1-pentane. One of the stereo isomers is optically active and the other is not.
1. Provide the structures of the two stereo isomers, indicating their absolute configurations using the Fischer projections.
2. Discuss are the two isomers formed in the equal amounts
3. Discuss the difference in optical properties of the two isomers.