Penta­aqua­tri-μ3-hydroxido-tris­(imino­diacetato)-μ3-oxido-tetra­hedro-calcium(II)tricobalt(III) 2.54-hydrate

摘要

In the title compound, [CaCo3(C4H5NO4)3(OH)3O(H2O)5]·2.54H2O, the Co atom is octa­hedrally coordinated by one imino­diacetate (ida) dianion as a facial O,N,O′-tridentate ligand, two μ3-OH groups and one μ3-O ligand, forming an partial Co3O4 cubane cluster. This unit coordinates to a Ca^II cation in an O,O′,O′′-tridentate fashion, generating a distorted CaCo3O4 cubane-type cluster. The Ca—μ3-O distances [2.429 (5)–2.572 (6) Å] are much longer than the Co—μ₃—O bonds [1.895 (5)–1.941 (5) Å]. The Ca^II cation is also coord­inated by five water mol­ecules with Ca—O distances in the range 2.355 (6)–2.543 (6) Å. There are three additional uncoordinated water mol­ecules in the asymmetric unit, the occupancy of which refined to 0.54 (3). In H₂O (or D₂O), the title complex hydrolyses to Ca²⁺ _aq cations and [Co₃(ida)₃(μ₂-OH)₃(μ₃-O)]²⁻ anions.