CHAPTER 4: Question 3

 

Simple Answers

There are three stereoisomers of the bromine containing compound. Two of these stereoisomers are enantiomers of one another and so will both be optically active. The third stereoisomer is an achiral meso compound which is not optically active and is a diastereomer of both of the other two stereoisomers.

There are six stereoisomers of the silicon containing compound. These are all optically active, and form three pairs of enantiomers. Each compound is a diastereomer of every isomer other than its enantiomer.
 
 

The silicon containing example in this question is taken from: K. Tamao, K. Nakamura, H. Ishii, S. Yamaguchi, and M. Shiro; J. Am. Chem. Soc., 1996, 118, 12469-70.
 
 

view 3D explanation of answers to question 3          view 2D explanation of answers to question 3

back to CHAPTER 4 answers          back to answers to problems          back to STEREOCHEMISTRY home page