Dielectric Constant Studies. IV. The Moments of Some Inorganic Compounds

The moments of some inorganic compounds have been determined, some in more than one solvent and the best values are believed to be: for SbCl3, 3.12; SbBr3, 2.47; SbI3, 1.58; AsI3, 0.96; AsBr3, 1.60; PI3, 0.0; AsF3, 2.65; and LiClO4, 7.84 Debye. The dielectric constant of solid AsF3 was measured and found to be 5.7. The moments of the molecules measured have been calculated from the electronegativity of the elements and compared with the measured values. A fair agreement is found with deviations greatest for molecules of highest polarizability and possessing large moments. The electronegativity values were deduced from the measurements of the hydrogen compounds or from their periodic relationship.