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The crystal structure of [Ni(NH 3 ) 6 ]SO 4  has been determined by single-crystal X-ray diffraction (P2 1 /c; Z = 4; a = 705.0(1), b = 1195.2(2), c = 1180.0(2) pm, β = 96.14(3)°; 2271 reflections; R 1  = 3.94%). In the hitherto unknown structure type, both the [Ni(NH 3 ) 6 ] 2+  and the SO 4  2-  ions form chains along [100], The six crystallographically different ammine ligands of the distorted [Ni(NH 3 ) 6 ] 2+  octahedra are involved in hydrogen bonds to six crystallographically equivalent SO 4  2-  ions (site symmetry C 1 ). The strength of the hydrogen bonds differs strongly (ν OD  of matrix isolated NH 2 D molecules: 2378 - 2494 cm -1  , N ∙∙∙ O distances: 272 - 340 pm). The temperature evolution of the IR bands reveals the decrease of the dynamic orientational disorder of the NH 3  molecules with decreasing temperature.

[Ni(NH 3 ) 6 ]S0 4 : Kristallstruktur und Infrarotspektren / [Ni(NH 3 ) 6 ]SO 4 : Crystal Structure and Infrared Spectra