| Summary: | The ionic title complex, [Ni(C2H8N2)3](SiF6), is built up of [Ni(en)3]2+ complex cations (en = 1,2-diaminoethane) and hexafluoridosilicate anions. Single crystals of the title complex were isolated from an aqueous–ethanolic Ni2+–en–SiF62− system. The Ni(II) and Si atoms are each located on a special position with site symmetry 3.2. The Ni(II) atom coordination sphere is octahedrally deformed, being coordinated by three chelating diamine ligands with an Ni—N distance of 2.1233 (18) Å. The crystal packing of the respective ions corresponds to the structure type of the hexagonal form of BN. Beside ionic forces, the packing is governed by N—H...F hydrogen bonds, which lead to the formation of hydrophobic channels running along the 63 screw axis. The structure was refined as an inversion twin [0.49 (3): 0.51 (3)].
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