Question

Although the stereochemistry of the alkene cannot be determined from an NMR spectrum, it can be deduced from the stereochemistry of the final dibromide product (see Chapter 7 in Carey). 1) clearly depict allof the stereoisomers for the final dibromide that could be formed from each stilbene isomer; 2) for the dibromide products, clearly label each chiral carbon with the appropriate R/S designation; 3) be sure to identify which dibromides form from which stilbene; 4) when two chiral centers are generated in each bromination and theoretically four products could potentially be observed. In actuality, only racemic or meso product(s) formed in each case. Explain why.

Answer 1