Molecular polarisability. The principal polarisabilities and susceptibilities of the phosphonitrilic chloride trimer

Abstract

At infinite dilution in benzene at 25° the molar polarisation, refraction, Kerr, and Cotton–Mouton constants of the phosphonitrilic chloride trimer are found to be, respectively, 75·9 c.c., 58·2 c.c., 2·1 × 10^–12, and 1·36 × 10^–12. Assuming the polarisability and susceptibility ellipsoids to be ones of rotation, these data lead to the following principal axes: b₁=b₂= 22·5 × 10^–24, b₃= 20·7 × 10^–24, k₁=k₂=–24·2 × 10^–29, and k₃=–26·0 × 10^–29.