Abstract

ESTIMATES of polarization and related constants of the four hydrogen halides1 appear to reveal certain peculiar, though simple relations. If a is the mean optical polarizability of a halide HX, b1 b2 respectively that along and perpendicular to the internuclear axis of symmetry S re the equilibrium internuclear distance of HX, and a(X) the polarisability of the negative ion X, I find that (1) a = l·242re3 2,3 and, further, if (2) b1 oc re3, then since 3a = b1+2b2, (2a) b2 oc re3, (2b) b1 oc b2, and (2c) b1 = a(X) (Born and Heisenberg4).

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