Acta Cryst. (2003). E59, m421-m424  [ doi:10.1107/S1600536803011747 ]

A new decavanadate with a tricobalt(II) cation and 18-crown-6, tris{hexaaquacobalt(II)} decavanadate bis(18-crown-6) decahydrate

U. Lee, Y.-H. Jung, H.-C. Joo and K.-M. Park

Abstract: The title compound, [Co^II(H₂O)₆]₃[V₁₀O₂₈]·(18-Crown-6)₂·10H₂O, was obtained by mixing 18-crown-6 with K₂[Co^II(H₂O)₆]₂[V₁₀O₂₈]·4H₂O. The centrosymmetric [V₁₀O₂₈]^6- polyanion forms a three-dimensional network via O-HO hydrogen bonds with water molecules. The VV distances are in the range 3.068  (1)-3.266  (1)  Å; the four types of V-O bond lengths are in the ranges 1.599  (3)-1.611  (2) (Ot), 1.923  (2)-2.030  (2) (Oc), 1.668  (2)-2.110  (3) (Ob) and 2.062  (2)-2.365  (2)  Å (Oh). The number of Co²⁺ cations in the structure could be controlled by the neutral, bulky 18-crown-6 ether. All of the six O atoms in the 18-crown-6 form hydrogen bonds with water molecules.

Online 10 June 2003

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