title: Crystal structure of 3-[({2-[bis-(2-hy-droxy-benz-yl)amino]-eth-yl}(2-hy-droxy-benz-yl)amino)-meth-yl]-2-hydroxy-5-methyl-benzaldehyde.
abstract: The non-symmetric title mol-ecule, C32H34N2O5, is based on a tetra-substituted ethyl-enedi-amine backbone. The mol-ecular structure consists of three hy-droxy-benzyl groups and one 2-hy-droxy-5-methyl-benzaldehyde group bonded to the N atoms of the di-amine unit. The ethyl-enedi-amine skeleton shows a regular extended conformation, while the spatial orientation of the phenol arms is governed by hydrogen bonds. In the 2-hy-droxy-5-methyl-benzaldehyde group, an intra-molecular S(6) O-H⋯O hydrogen bond is observed between the alcohol and aldehyde functions, and the neighbouring phenol arm participates in an intra-molecular S(6) O-H⋯N hydrogen bond. The third phenol group is involved in a bifurcated intra-molecular hydrogen bond with graph-set notation S(6) for O-H⋯N and O-H⋯O intra-molecular hydrogen bonds between neighbouring amine and phenol arms, respectively. Finally, the fourth phenol group acts as an acceptor in a bifurcated intra-molecular hydrogen bond and also acts as donor in an inter-molecular hydrogen bond, which connects inversion-related mol-ecules into dimers with R 4 (4)(8) ring motifs.
authors.affiliation: Depto. de Química - Universidade Federal de Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil.
authors.forename: Alexandra S
authors.initials: AS
authors.lastname: Fonseca
authors.affiliation: Depto. de Química - Universidade Federal de Santa Catarina, 88040-900 Florianópolis, Santa Catarina, Brazil.
authors.forename: Adailton J
authors.initials: AJ
authors.lastname: Bortoluzzi
keywords: crystal structure; non-symmetrical compound; phenol-arm substituents; tetra­substituted ethyl­enedi­amine