Many Interesting Synthetic Organic Transformations Can Be Achieved Based on the Chemistry of the Main Group Elements. Nitrogen (Hydrazones, Chiral Sp3 Nitrogen, Aziridines), Phosphorus (Chiral Trivalent Phosphorus, Ylides, Phosphonates, the Use of Trivalent Phosphorus in the Determination of Enantiomeric Excesses), Silicon (Creation of Carbon-Silicon Bonds, Oxidation, Olefination, Brook Rearrangement), Tin (Creation of Carbon-Tin Bonds, Chirality, Cross Coupling Reaction) and Sulfur (Thiols, Thioethers, Thioacetates, Sulfoxydes, Sulfones, Sulfoximines).