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List of contents
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.
Summary
Volume II/24 presents the rotationally resolved high resolution spectroscopic data on diamagnetic and paramagnetic molecules as well as on molecular ions and radicals up to date considering the publications up to and partly including 1997. For subvolume II/24D2 covering the polyatomic radicals, publications up to the year 2000 are taken into account. The spectroscopic information collected has been obtained principally from gas phase microwave , mm-wave and sub-mm wave measurements. In addition, gas phase data have been included derived from methods related to microwave spectroscopy by employing a coherent radiation source. These are molecular beam techniques, radio frequency spectroscopy, electron resonance spectroscopy, laser spectroscopy, double resonance and saturation techniques. Some other methods are considered if the accuracy of the derived molecular parameters is comparable to that of microwave spectroscopy owing to a good statistics in the analysis of data, and no microwave data are available. Examples would be Fourier infrared spectroscopy or laser induced fluorescence.
