[Ni(NH3 )6]S04 : Kristallstruktur und Infrarotspektren / [Ni(NH3)6]SO4: Crystal Structure and Infrared Spectra

Autor:	Heinz Dieter Lutz, Christoph Mockenhaupt, Ralf Eßmann
Rok vydání:	1999
Předmět:	Diffraction Crystallography Octahedron Chemistry Hydrogen bond Molecule Infrared spectroscopy General Chemistry Crystal structure Structure type Ion
Zdroj:	Zeitschrift für Naturforschung B. 54:843-848
ISSN:	1865-7117 0932-0776
DOI:	10.1515/znb-1999-0704
Popis:	The crystal structure of [Ni(NH3)6]SO4 has been determined by single-crystal X-ray diffraction (P21/c; Z = 4; a = 705.0(1), b = 1195.2(2), c = 1180.0(2) pm, β = 96.14(3)°; 2271 reflections; R1 = 3.94%). In the hitherto unknown structure type, both the [Ni(NH3)6]2+ and the SO4 2- ions form chains along [100], The six crystallographically different ammine ligands of the distorted [Ni(NH3)6]2+ octahedra are involved in hydrogen bonds to six crystallographically equivalent SO4 2- ions (site symmetry C1). The strength of the hydrogen bonds differs strongly (νOD of matrix isolated NH2D 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 NH3 molecules with decreasing temperature.
Databáze:	OpenAIRE
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