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Li4Sr2[Cr2N6]: Ein Hexanitridodichromat (V)

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Hochrein,  O.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kohout,  M.
Miroslav Kohout, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  W.
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kniep,  R.
Rüdiger Kniep, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Hochrein, O., Kohout, M., Schnelle, W., & Kniep, R. (2002). Li4Sr2[Cr2N6]: Ein Hexanitridodichromat (V). Zeitschrift für Anorganische und Allgemeine Chemie, 628(12), 2738-2743. doi:10.1002/1521-3749(200212)628:12<2738:AID-ZAAC2738>3.0.CO;2-P.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-30E7-A
Abstract
The quaternary hexanitridodichromate(V) Li(4)sr(2)[Cr2N6] was obtained by reaction of the metals with flowing nitrogen at 900 degreesC as black-shining crystals with a platy habit. The crystal structure was determined by X-ray single crystal methods (orthorhombic, Pbca; a = 914.0 pm, b = 735.4 pm, c = 1053.6 pm; Z = 4). The compound contains isolated complex anions [Cr2N6](8-) consisting of two tetrahedra CrN4 sharing a common edge. The distance Cr-Cr in the complex anion is 249.7 pm. The analysis of the Electron Localization Function (ELF) indicates bonding interactions Cr-Cr. Strontium is in a sixfold (distorted octahedral), Lithium in a distorted tetrahedral ([3 + 1]) coordination by nitrogen. According to measurements of the magnetic susceptibility the compound is diamagnetic.