Abstract

Inelastic neutron scattering has been used to investigate the influence of different guest molecules, G, on the rotational hindering potential for NH 3 in Hofmann clathrates Ni(NH 3) 2Ni(CN) 4 · mG. Non-polar guests (benzene and biphenyl) lead to quasi-free rotor environments. For polar guests (water, aniline, phenol, dioxane), dipolar interactions give rise to an increase of the rotational barrier; most often, complex spectra result from statistical orientational disorder of the guest molecules.

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