Electronic Energy Levels of Small Polyatomic Transient Molecules

The experimentally determined eletronic energy levels of approximately 500 neutral and ionic transient molecules possessing from 3 to 6 atoms are tabulated together with the associated vibrational structure, the radiative lifetime, the principal rotational constants, and references to the pertinent literature. Vibrational and molecular beams, and in rare‐gas and nitrogen matrices are included. The types of measurement surveyed include conventional and laser‐ based absorption and emission techniques, laser absorption with mass analysis, and ultraviolet photoelectron spectroscopy.