The measured distortion polarizations of a group of bis-arylmercury compounds show that they do not exhibit exalted atom polarizations. The apparent orientation polarization of each is appreciable. Two of them, which are substituted symmetrically with methoxyl or nitro, exhibit moments expected from the rotation which is generated in such substances. By comparison of bis-4-bromophenylmercury202 with the analogue containing the ordinary isotopic mixture of mercury the apparent moments are shown to be unrelated to nuclear asymmetry. The conclusion is unaltered that the apparent moments of bis-arylmercury compounds are due to effective non-linearity in the C—Hg—C bond.
The barium isotopic mixture for the metal-poor subgiant star HD 140283
