Abstract
The title lanthanide complexes, [Ln(DAPBH(2))(CH(3)OH)(H(2)O)(3)]Cl(3)·2CH(3)OH [Ln(III) = Tb and Dy; DAPBH(2) = 2,6-di-acetyl-pyridine bis-(benzoyl-hydrazone), C(23)H(21)N(5)O(2)], are isotypic. The central lanthanide ions are nine-coordinate, being ligated by three N and two O atoms from the penta-dentate DAPBH(2) ligand, and four O atoms from the coordinated methanol mol-ecule and three coordinated water mol-ecules. The coordination geometry of the lanthanide ion is a distorted capped square anti-prism. In the crystals, the various components are linked by O-H⋯Cl, N-H⋯Cl and O-H⋯O hydrogen bonds, forming three-dimensional supra-molecular frameworks. Within the frameworks, there are C-H⋯Cl and C-H⋯O hydrogen bonds and offset π-π inter-actions (inter-centroid distance ca 3.81 Å).