Dielectric investigations of nonrigid molecules

In order to characterize the nature and magnitude of molecular interactions in liquids, dielectric relaxation experiments in the microwave region on 2, 2'-bipyridine, 2, 2'-dibromobiphenyl, 4-bromobiphenyl, and anisole have been made. In general, the modes of relaxation for each of these compounds may be separated into processes involving over-all molecular tumbling and those involving internal motions of segments of the molecule.