Chapter 15 Benzenoid hydrocarbons in space: The evidence and implications

Chapter 16 The distortive tendencies of delocalized π electronic systems. Benzene, cyclobutadiene and related heteroannulenes

Chapter 17 The spin-coupled valence bond description of benzenoid aromatic molecules

Chapter 18 Semiempirical valence bond views for benzenoid hydrocarbons

Chapter 19 Scaling properties of topological invariants

Chapter 20 Molecular topology and chemical reactivity of polynuclear benzenoid hydrocarbons

Chapter 22 Calculating the numbers of perfect matchings and of spanning trees, Pauling's orders, the characteristic polynomial, and the eigenvectors of a benzenoid system

Chapter 23 The existence of Kekulé structures in a benzenoid system

Chapter 24 Peak-valley path method on benzenoid and coronoid systems

Chapter 25 Rapid ways to recognize Kekuléan benzenoid systems

Chapter 26 Methods of enumerating Kekulé structures, exemplified by applications to rectangle-shaped benzenoids

Chapter 27 Clar's aromatic sextet and sextet polynomial

Chapter 28 Caterpillar (Gutman) trees in chemical graph theory