Interactions between dimers of {1,1'-[o-phenylenebis(nitrilomethylidyne)]di-2-naphtholato-kappa4O,N,N',O'}nickel(II).

In the title compound, [Ni(C(28)H(18)N(2)O(2))], the Ni(II) centre has a square-planar coordination geometry in which the Schiff base ligand acts as a cis-O,N,N',O'-tetradentate ligand. The crystal structure is built up of centrosymmetric dimer units stacked into chains along the [010] direction. Adjacent chains associate via C-H...O hydrogen bonding only, leading to a two-dimensional sheet-like structure consisting of layers parallel to (101). The cofacial dimeric complex contains an Ni...Ni contact of 3.291 (4) A.