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The title six-coordinated distorted octa­hedral complex, [Cu(C 6 H 3 N 2 O 4 ) 2 (C 10 H 8 N 2 )]·2H 2 O, consists of two 3-carboxy­pyrazine-2-carboxyl­ate anions and one 2,2′-bipyridine ligand. There is a twofold rotation axis positioned at the Cu II  center. The N atoms of the pyrazine ring occupy the axial positions and two proton-transferred O atoms of tbe acid together with the two N atoms of the 2,2′-bipyridine ligand complete the equatorial plane. The inter­actions existing in the crystal structure are inter­molecular O—H⋯O hydrogen bonds, and C—H⋯O and C—O⋯π inter­actions (O⋯π =3.145 Å, C—O⋯π = 149.75°).

(2,2′-Bipyridine)bis(3-carboxypyrazine-2-carboxylato)copper(II) dihydrate