Crystal structure of 3-[({2-[bis­(2-hy­droxy­benz­yl)amino]­eth­yl}(2-hy­droxy­benz­yl)amino)­meth­yl]-2-hydroxy-5-methyl­benzaldehyde

The non-symmetric title mol­ecule, C(32)H(34)N(2)O(5), is based on a tetra­substituted ethyl­enedi­amine backbone. The mol­ecular structure consists of three hy­droxy­benzyl groups and one 2-hy­droxy-5-methyl­benzaldehyde group bonded to the N atoms of the di­amine unit. The ethyl­enedi­amine skeleton shows a regular extended conformation, while the spatial orientation of the phenol arms is governed by hydrogen bonds. In the 2-hy­droxy-5-methyl­benzaldehyde group, an intra­molecular S(6) O—H⋯O hydrogen bond is observed between the alcohol and aldehyde functions, and the neighbouring phenol arm participates in an intra­molecular S(6) O—H⋯N hydrogen bond. The third phenol group is involved in a bifurcated intra­molecular hydrogen bond with graph-set notation S(6) for O—H⋯N and O—H⋯O intra­molecular hydrogen bonds between neighbouring amine and phenol arms, respectively. Finally, the fourth phenol group acts as an acceptor in a bifurcated intra­molecular hydrogen bond and also acts as donor in an inter­molecular hydrogen bond, which connects inversion-related mol­ecules into dimers with R (4) (4)(8) ring motifs.