Crystal structure of dibarium (Ethylenediaminetetraacetato)cuprate(II) diperchlorate hexahydrate, Ba2[Cu(Edta)](ClO4)2 ⋅ 6H2O

Abstract

Compound Ba2[Cu(Edta)](ClO4)2 ⋅ 6H2O is synthesized and its crystal structure is determined [R = 0.0500 for 4439 reflections with I > 2σ(I)]. The structure consists of the [Cu(Edta)]2− anionic complexes, hydrated barium cations, Cl 4 − anions, and molecules of crystallization water, which are interlinked into a framework. The hexadentate Edta4− ligand coordinates the Cu atom forming the polyhedron in a shape of a tetragonal bipyramid, which is asymmetrically stretched along the OR-Cu-OR, axis (Cu-O, 2.262 and 2.532 A). The mean lengths of the equatorial Cu-N and Cu-O bonds are 2.011 and 1.952 A, respectively. The anionic complex is bound to six Ba atoms. Two independent Ba atoms have different environments; their coordination numbers are nine and ten. The Ba-O distances lie in the range 2.669–3.136 A. Layers of Ba atoms parallel to the x0z plane are distinguished in the structure.