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metal-organic compounds
The X-ray structure analysis of the title compound, (C6H16N)4[Mo8O26].2H2O, has confirmed the presence of the [Mo8O26]4− anion. Eight edge- and corner-sharing MoO6 octahedra constitute the anion, which has short terminal Mo—O bonds [1.684 (3)–1.711 (3) Å], bonds of intermediate length [1.749 (3)–1.990 (3) Å] and long bonds [2.140 (2)–2.472 (3) Å]. The structure consists of β-Mo8O26 polyanions, triethylammonium cations and water molecules of crystallization. The water molecules and triethylammonium cations are linked to the terminal and bridging O atoms of the anion by hydrogen bonds. Hydrogen bonds also exist between the water molecules and the triethylammonium cations.
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