Crystal structure of NaBa2[Co(Edta)]2(ClO4)3 · 9H2O

Crystals of Ba Na ethylenediaminetetraacetatocobaltate(III) perchlorate, NaBa2[Co(Edta)]2(ClO4)3 · 9H2O, contain two crystallographically nonequivalent Ba2+ cations and two complex cations [Co(Edta)]− (Edta4− is ethylenediaminetetraacetic acid anion), the latter anions showing opposite chirality. The nearest surrounding of the Ba2+ ions involves three water molecules (including two bridging water molecules), six O atoms of four complexes [Co(Edta)]− and the perchlorate O atom. Tetrameric fragments Ba2(H2O)4[Co(Edta)]2(ClO4)2 are united through the Ba-O bonds into layers with the Ba atoms in the middle of the layers and the perchlorate ions and complex anions at the periphery; in the latter anions, noncoordinated O atom of one of the R-metallocycles is directed outside. The Na atom of the Na(H2O)(ClO4) group located between the layers is bonded to these O atoms of the neighboring layers.