Intermolecular Interactions.- Intermolecular Bonding.- Chemical Reactions in the Framework of Single Quantum Systems.- The Molecule and Its Environment.- Dynamic Aspects of Intermolecular Interactions.- Atomic Interactions and the Charge Density.- Cyclometallation of Alkylphosphines.- C-H? O Hydrogen Bonds in Organometallic Crystals.- The Importance of Intra- and Intermolecular Weak Bonds in Transition Metal Coordination Compounds.- Relationships between Experiment and Theory in the Study of Intermolecular Interactions.- Study of Intermolecular Interactions Using Crystal Structure Database as Reference: A Preliminary Report on the Adjustment of van der Waals Constants.- Reactivity in Solid State and Electron Deformation Density Determinations.- Metal Amine Carboxylates as Hydronium Ion Traps. Part 5.1. The Structure of K1/2(H5O2)1/2{(?)D-trans-(O6)-[Co(1,3-SS-pddadp)]}·2H2O (I) Determined at 18°C and ?100°C and of Li{(?)D-trans-(O6)-[Co(1,3-SS-pddadp)]}·7H2O (II) at 18°C. Intra- and Intermolecular Interactions in the Crystallization of Metal Diamine Carboxylates and on Hydronium Ion Traps.- List of Contributors.