Understanding Chemical Thermodynamics Author:George C. Pimentel, Richard D. Spratley In this book, the hydrogen molecule ion H2+ is shown to elucidate chemical bonding in the same way that the hydrogen atom clarifies atomic structure. With the Pauli Principle, the molecular orbitals of the H2+ give coherence to the many-faceted subject of chemical bonding. Via the correlation-diagram and without mathematical apparatus, the ess... more »ential features of chemical bonding can be exposed.
The quantum mechanical view of the atom is first reviewed to show the qualitative differences and likenesses between physical behavior on the scale of atomic dimensions and that of the macroscopic world we sense around us. With that background, the existence of molecular orbitals in simple diatomic molecules can be developed intuitively and convincingly. Then traditional and recent approximate representations of bonding an be understood in terms of valid quantum mechanical principles.
Electron-dot formulas, pairs and quartets, and pigeonhole diagrams are considered. Orbital hybridization and electron repulsion explanations of bond angles are critically compared. The monograph encompasses and connects electron donor-acceptor bonding (IO3- and Xe03), electron excess bonding (I3-, XeF2, and HF2-), and electron deficient bonding (B2H5, BeCl2, and metallic lithium). Bonding in solids and liquids is systematically explored.« less