Molecular Orbitals in Conjugated Systems

This lecture covers the concept of molecular orbitals in conjugated systems, discussing bond lengths, energy barriers for rotation, cumulated double bonds, and the electronic structure of linear and cyclic conjugated systems. It explains the Hückel theory, frontier orbitals, and bond orders in butadiene, as well as the energy levels in linear and cyclic conjugated systems. The lecture also explores the approximation of MO energy diagrams for cyclic systems and oligoacenes, emphasizing the stability of aromatic systems and the impact of Peierl's distortion on the electronic structure.