Polyatomic Free Radicals

The present subvolume II/24D2 covers polyatomic free radicals. The literature up to and including the year 2000 is taken into account, starting from 1992/93. Previous data on paramagnetic species can be found in volumes II/4, II/6, II/14, and II/19. The author presents the material in four chapters: Linear, Symmetric, Nonlinear Triatomic, and Larger Polyatomic free radicals. Each is headed by an introduction where the numerous intra-molecular interactions and their hamiltonians are extensively discussed and the coupling parameters are defined. Extensive tabulations of experimental transition frequencies are included for each species. The basic publications in the field are cited so the reader may use this compilation as a guide to spectroscopy of paramagnetic species.