Abstract

Electric susceptibility of ethyl chloride has been determined in the microwave region at 8,780 mc/s over a pressure range of 10 cm to 75 cm of mercury, and a temperature range of 263° K to 353° K. It has been found that the total susceptibility, at constant temperature, varies almost linearly with pressure. The contribution due to quantised transitions to total susceptibility has been calculated from the data on absorption measurements and it is found to be 0·45 × 10−3. Since most of this contribution is due to zero frequency transitions, no measurable dispersion is observed in this region. It has been found possible to determine the values of dipole moment and the sum of atomic and electronic polarisations from the data on temperature variation of susceptibility. The values are μ=2·06 × 10−18 e.s.u and (P A +P E )=22·70. These results are in fair agreement with those obtained earlier

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