Textbook in PDF format This is a text dealing with the basics of quantum mechanics and electronic structure theory. It provides an introduction to molecular spectroscopy and to the subject of molecular dynamics. The Basic Tools of Quantum Mechanics Approximation Methods Nuclear Motion Atomic Orbitals Molecular Orbitals Quantum Mechanics in Reactions Further Characterization of Molecular Orbitals Electronic Configurations Symmetry of Electronic Wavefunctions Angular Momentum and Group Symmetries of Electronic Wavefunctions Evaluating the Matrix Elements of N-electron Wavefunctions Quantum Mechanical Picture of Bond Making and Breaking Reactions Molecular Rotation and Vibration Time-dependent Quantum Dynamics Spectroscopy Collisions and Scattering Higher Order Corrections to Electronic Structure Multiconfiguration Wavefunctions Multi-Determinant Wavefunctions Response Theory Problem Sets Problems Index Glossary