5,5′-Dimeth­oxy-2,2′-[(pentane-1,5-diyl­dioxy)bis­(nitrilo­methyl­idyne)]diphenol

The mol­ecule of the title compound, C(21)H(26)N(2)O(6), which lies across a crystallographic inversion centre, crystallizes with two unique half-molecules in the symmetric unit and adopts a linear configuration and the imino group is coplanar with the aromatic ring, making a dihedral angle of 3.26 (3)°. Strong intra­molecular O—H⋯N and weak inter­molecular O—H⋯O and C—H⋯O hydrogen bonds and weak inter­molecular π–π stacking inter­actions [centroid–centroid distance = 4.419 (2) Å]establish an infinite three-dimensional supra­molecular structure.