Intermolecular Interactions: Forces and Bonds

This lecture explores the fundamental questions related to intermolecular interactions, such as the types of forces determining a compound's state and the strengths of various bonds like dipole-dipole and ion-ion interactions. It delves into the concept of hydrogen bonding, the formation of condensed phases, and the role of polar and apolar molecules in determining melting and boiling points. The lecture also covers the significance of hydrogen bonds in biological molecules, the structure of DNA based on Watson-Crick base pairs, and the prediction of relative strengths of intermolecular interactions. Emphasis is placed on understanding the energy dependence and factors influencing London interactions.