Molecular Spectroscopy: Vibrational Modes

This lecture covers different types of molecular spectra, including electronic, vibrational, and rotational spectra. It delves into the principles of vibrational spectroscopy, focusing on harmonic oscillators, Schrödinger equation solutions, and selection rules. The lecture also discusses the vibrational spectra of polyatomic molecules, normal modes, and the rules for infrared absorption transitions. Additionally, it explores the isotopic distribution in mass spectrometry, the contribution of isotopes to mass spectra, and the analysis of molecular ions. The instructor provides insights into the interpretation of mass spectra, isotopic patterns, and the determination of molecular formulas.