2-{[(4-{[(2-Hy-droxy-phen-yl)(phen-yl)methyl-idene]amino}-but-yl)imino](phen-yl)meth-yl}phenol.

The asymmetric unit of the title compound, C(30)H(28)N(2)O(2), comprises half of a potential tetra-dentate Schiff base ligand; an inversion centre is situtated at the center of the butane-diamine spacer. The central methyl-ene segment of the diamine spacer is disordered over two positions with a refined site-occupancy ratio of 0.651 (7):0.349 (7). The phenyl ring and the hy-droxy-substituted benzene ring are almost perpendicular to each other, with a dihedral angle of 87.90 (8) Å. Intra-molecular O-H⋯N hydrogen bonds make S(6) ring motifs.