Explain why the following products are not optically active.
a. the product obtained from the reaction of 1,3-butadiene with cis-1,2 dichloroethene.
b. the product obtained from the reaction of 1,3-butadiene with trans-1,2-dichloroethene.
The product from a is not optically active because it is a meso compound.
The syn addition to trans-isomer gives threo enantiomeric mixture, therfore the product from b is also not optically active.
Very well explained and drawn!
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