Structural Investigation of Nickel(II) Complexes. XIII. μ-[2,3,5,6-Tetra-(2-pyridyl)pyrazine]-bis-[bis(acetato)aquanickel(II)]–Formaldehyde (1/1)

In the title compound, [Ni₂(C₂H₃O₂)₄(C₂₄H₁₆N₆)(H₂O)₂].CH₂O, the coordination polyhedron of each Ni^II centre is a distorted octahedron formed by three N donors from a tetra(2-pyridyl)pyrazine molecule and an O donor of a water molecule in the equatorial positions, and by two O atoms from different acetate anions in the axial positions. The formaldehyde molecule is not coordinated; it is disordered over two sites related by a crystallographic twofold axis.

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