VIBRATIONAL AND ELECTRONIC-ENERGY LEVELS OF POLYATOMIC TRANSIENT MOLECULES - SUPPLEMENT A

A summary is presented of recently published, critically evaluated exp erimental vibrational and electronic energy level data for neutral and ionic transient molecules and high temperature species possessing fro m three to sixteen atoms. Although the emphasis is on species with lif etimes too short for study using conventional sampling techniques, the re has been selective extension of the compilation to include data for isolated molecules of inorganic species such as the heavy-metal oxide s, which are important in a wide variety of industrial chemical system s. Radiative lifetimes and the principal rotational constants are incl uded. Observations in the gas phase, in molecular beams, and in rare-g as and diatomic molecule matrices are evaluated. The types of measurem ent surveyed include conventional and laser-based absorption and emiss ion techniques, laser absorption with mass analysis, and photoelectron spectroscopy. Not counting isotopic species, 904 molecules are survey ed, and 2696 distinct references are given. (C) 1998 American Institut e of Physics and American Chemical Society. [S0047-2689(98)00102-0].