STRUCTURE AND PROPERTIES OF ORGANIC MOLECULES Atomic orbitals. Electronegativity. Oxidation number. Hybridization. Electronic structure: Molecules, radicals and ions: structure and stability. Polarity. Resonance. Tautomerism. Physico-chemical properties. Intra-and intermolecular forces. Hyperconiugation. Isomers: characterization and properties. The carbon sp3, sp2, sp: nomenclature, structure and properties of the main classes of organic compounds. Organic acids and bases. STEREOCHEMISTRY: Conformation and conformational analysis. Newman projections. Chiral molecules. Enantiomers and diastereoisomers. Fischer projections. Assignment of absolute configuration. Systems of nomenclature R / S and D/L. Optical activity. REACTIVITY Chemical reactions: introduction. Kinetics and thermodynamics of reactions. Heterolysis and homolysis. Stereo-, regio- and chemo- selectivity and specificity of reactions. Radical reactions: substitutions Ionic reactions: Nucleophilic and electrophilic additions. Cicloadditions Nucleophilic substitutions. Electrophilic aromatic substitutions. Nucleophilic aromatic substitutions. Eliminations Carbohydrates: structure and properties. Haworth projections. D/L, α/β series.