Piperazine-1,4-diium bis(hexahydroxidoheptaoxidohexaborato-κ3O,O′,O′′)cobaltate(II) hexahydrate

Abstract

In the title hydrate, (C4H12N2)[Co{B6O7(OH)6}2]·6H2O, both the dication and dianion are generated by crystallographic inversion symmetry. The Co2+ion in the dianion adopts a fairly regular CoO6octahedral coordination geometry arising from the twoO,O′,O′′-tridentate ligands. In the crystal, the dianions and water molecules are linked by O—H...O hydrogen bonds, generating a framework with large [100] channels, which are occupied by the organic dications. N—H...O and C—H...O hydrogen bonds consolidate the structure.