Bis(di-2-pyridylmethane­diol-κ3N,O,N′)copper(II) bis­(tetra­fluorido­borate) dihydrate

The title complex, [Cu(C11H10N2O2)2](BF4)2·2H2O, was isolated as a dihydrate from a 1:2 molar mixture of copper(II) tetra­fluoridoborate hexa­hydrate with di-2-pyridyl ketone in aqueous solution. The centrosymmetric complex cation is structurally similar to that found in previously reported salts and exhibits Cu—O bonds deviating by 25 degrees from an octa­hedral geometry by the so-called `off-axis angle' distortion. The BF4− anion exhibits a two site disorder of the fluorine atoms [ratio 0.210 (8):0.790 (8)].