Bis[1-meth­oxy-2,2,2-tris­(pyrazol-1-yl-κN (2))ethane]­nickel(II) bis­(tri­fluoro­methane­sulfonate) dihydrate

In the title salt, [Ni(C(12)H(14)N(6)O)(2)](CF(3)SO(3))(2)·2H(2)O, the Ni(II) cation is located on an inversion centre and is coordinated by six N atoms from two tridentate 1-meth­oxy-2,2,2-tris­(pyrazol-1-yl)ethane ligands in a distorted octa­hedral geometry. The Ni—N distances range from 2.0594 (12) to 2.0664 (12) Å, intra-ligand N—Ni—N angles range from 84.59 (5) to 86.06 (5)°, and adjacent inter-ligand N—Ni—N angles range between 93.94 (5) and 95.41 (5)°. In the crystal, inversion-related pyrazole rings are π–π stacked, with an inter­planar spacing of 3.4494 (18) Å, forming chains that propagate parallel to the a-axis direction. Inter­molecular O—H⋯O hydrogen bonds are present between water mol­ecules and tri­fluoro­methane­sulfonate anions.