Physical properties and chemical constitution, Optical isomerism, Nucleophilic substitution at a saturated carbon atom, asymmetric synthesis, Geometrical isomrism, stereochemistry of alicyclic compounds, Stereochemistry of bophenyal compounds, Stereochemistry of some elements other than carbon, Carbohydrates Terpenoids, Carotenoids, Polycyclk aromatic hydrocarbons.