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The structure of the penta­aqua­oxo­vanadium(IV) ion in a salt with singly charged counter‐ions is presented. In [VO(H2O)5](CF3SO3)2, the six‐coordinate V atom is coordinated to the oxo group with a short bond [1.577 (2) Å]. The equatorial V—O bond lengths are 2.0262 (18) and 2.0277 (17) Å. The aqua ligand trans to the oxo group is subject to its trans influence, which leads to a somewhat longer V—O bond [2.175 (2) Å]. In the structure, the cation and both anions are situated on crystallographic mirror planes. The cation and anions engage in a number of relatively long hydrogen bonds [2.725 (2)–2.834 (2) Å].

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The title compound, mer-[RuCl(3)N(C(18)H(15)As)(2)], is the first structurally characterized example of a nitride complex in which ruthenium is six-coordinated to monodentate ligands only. The Ru[triple-bond]N bond length [1.6161 (15) A] is relatively long, and the trans influence of the nitride ligand is reflected by the difference between the Ru--Cl(trans) and Ru--Cl(cis) bond lengths [0.1234 (4) A]. The N--Ru--Cl(trans) axis is sited on a twofold axis.