Stereoisomerism, is in my understanding, the ability of a molecule to allow different spatial arrangement. While, optical isomerism is a form of stereoisomerism in which molecules are non-superimposable. See, this is where my chemistry understanding lacks... I think the functional groups are the double carbon bonds in this reaction as they are electron dense thererfore susceptible to an electrophile, but i am not positive on that... Pretty sure there is also a chiral carbon in the molecule.. Nope, no final product. The idea of the task was to prove that by performing a reaction say Friedel Crafts Alkylation or Birch Reduction, one could attain more than one product.. or a product that can have stereoisomers...