Bis­(pyrazine-2-carbox­amide)­bis­(tri­fluoro­methanesulfonato)copper(II) monohydrate

The copper(II) ion in [Cu(C₅H₅N₃O)₂(CF₃SO₃)₂]·H₂O lies on a center of symmetry and is coordinated by two pyrazine­carbox­amide ligands in a square-planar geometry with Cu—O and Cu—N distances of 1.9445 (14) and 1.9680 (17) Å, respectively. The Cu(C₅H₅N₃O)₂ unit is approximately planar, with an average atomic deviation of 0.057 (4) Å from the least-squares plane. Each copper center is further coordinated, in the axial direction, by two symmetry-equivalent O atoms from tri­fluoro­methane­sulfonate anions with a Cu—O distance of 2.4871 (17) Å, giving the copper(II) ion a Jahn–Teller distorted-octahedral geometry.