Dua A. Quantum Chemistry and Spectroscopic Approach 2026

Textbook in PDF format

This book presents quantum mechanics through a systematic progression from classical atomic models to modern quantum theory. Beginning with foundational concepts, the text develops Schrödinger's equation and its applications to fundamental quantum systems. Mathematical rigor is balanced with physical interpretation throughout.
Detailed derivations of quantum mechanical principles.
Comprehensive treatment of particle systems, rigid rotators, and harmonic oscillators.
In-depth analysis of hydrogen atom wavefunctions and multi-electron systems.
Applications to rotational, vibrational, and electronic spectroscopy.
Comparative presentation of Valence Bond and Molecular Orbital theories.
Ideal for advanced undergraduate and graduate students in chemistry and physics.
Classical Mechanics
Towards Quantum Mechanics
Introduction to Quantum Mechanics
Particle in a Box: Quantisation of Translational Energy
Rigid Rotator and Rotational Spectra
Linear Harmonic Oscillator and Vibrational Spectra
“Hydrogen Atom”: Quantisation of Electronic Energy
Electronic Spectroscopy
Multielectron System and Approximate Methods
Chemical Bonding