... mechanism: 14 Stereochemistry Racemic mixture 15 Already has asymmetric carbon 16 asymmetric carbons are created 17 Additions of halogens 18 Major addition product – NOT a dihalide 19 Stereochemistry asymmetric... hydrogen – hydrogenation 26 Reaction mechanism: Syn addition 27 Stereochemistry 28 29 Alkene epoxidations – Anti hydroxylations 30 Stereochemistry 31