DIELECTRIC RELAXATION AND STRUCTURE.
Abstract
The research has been a continuation and extension of earlier work in this laboratory, which established dielectric relaxation time as a rough but effective tool for the investigation of molecular structure and inter- and intramolecular forces. The measurement of the dielectric constants and losses carried out at microwave frequencies on solutions of seceral substituted benzenes, biphenyls and naphthols made possible the calculation of the relaxation times of the molecules and of the substituent polar groups. The values of these relaxation times give evidence as to intramolecular rotational freedom, steric hindrance, weak hydrogen bonding, and in p-diacetobenzene, a resonance effect. Similar measurements extended down to 2 mm. wavelength confirmed the existence of three absorption regions reported in the literature for the primary aliphatic alcohols in the pure liquid state, the lowest frequency region associated with the hydrogen-bonded liquid and the highest with hydroxyl group rotation, as shown by the closeness of the corresponding relaxation time to that found for hydroxyl group rotation in other molecules. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1969
- Accession Number
- AD0690241
Entities
People
- Charles P. Smyth
Organizations
- Princeton University