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In the title compound, (C2H8N)6[V10O28]·H2O, the [V10O28]6− polymetalate anion has crystallographic mirror symmetry with six V atoms and 12 O atoms lying on the mirror plane. Each of the VV atoms adopts a distorted octa­hedral geometry. Eight terminal O atoms are bonded to VV atoms with double bonds and the others act as bridging atoms. In the crystal structure, a network of N—H...O and O—H...O hydrogen bonds helps to establish the packing.

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In the title compound, [Cr2Ni(C16H14N2O2)2(CN)4(C10H24N4)]·2CH3OH, each [Cr(salen)(CN)2] unit {salen is 2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate} acts as a monodentate ligand through one of its two cyanide groups N bound to a central [Ni(cyclam)]2+ core (cyclam is 1,4,8,11-tetra­azacyclo­tetra­deca­ne). Each CrIII ion is coordinated by two N and two O atoms from a salen ligand situated in the equatorial plane with two trans cyanide C atoms, yielding a distorted octa­hedral coordination geometry. The NiII atom lies on an inversion center and is octa­hedrally coordinated by a cyclam ligand lying in the equatorial plane and by two cyanide N atoms. The asymmetric unit contains one half of the complex mol­ecule and a methanol solvent mol­ecule. In the crystal structure, the complex mol­ecule is linked to the methanol solvent mol­ecules via O—H...O and N—H...O hydrogen bonds. Individual complex mol­ecules are linked by C—H...N hydrogen bonds, forming chains along b.
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