The crystal structure of a spherical vanadium complex encapsulating a nitrate anion.

The crystal structure of a nitrate anion caged in spherical vanadium and oxygen structure surrounded by sodium hy-droxy and water solvent mol-ecules, systematic name poly[[hepta-deca-aqua-tetra-deca-oxidonona-sodium][penta-cosa-aqua-nitratoundeca-oxido-penta-deca-vanadium]], H(61)NNa(9)O(71)V(15) is reported. The complex crystallizes in the non-centrosymmetric Cc space group and exhibits many inter- and intra-molecular hydrogen-bonding inter-actions. The complex contains V(IV) and V(V) centres, which are six-coordinate or octa-hedrally coordinated. The sodium atoms in this structure sit outside of the sphere with varying geometries and coordination numbers ranging from 5-8. The inter-actions between the sodium hy-droxy sheet and spherical vanadium contributes to the packing of the mol-ecules within the structure.