Crystal structures of two isotypic lanthanide(III) complexes: tri­aqua­[2,6-di­acetyl­pyridine bis­(benzoyl­hydrazone)]methano­llanthanide(III) trichloride methanol disolvates (Ln (III) = Tb and Dy)

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-di­acetyl­pyridine bis­(benzoyl­hydrazone), 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 penta­dentate DAPBH(2) ligand, and four O atoms from the coordinated methanol mol­ecule and three coordinated water mol­ecules. The coordination geometry of the lanthanide ion is a distorted capped square anti­prism. In the crystals, the various components are linked by O—H⋯Cl, N—H⋯Cl and O—H⋯O hydrogen bonds, forming three-dimensional supra­molecular frameworks. Within the frameworks, there are C—H⋯Cl and C—H⋯O hydrogen bonds and offset π–π inter­actions (inter­centroid distance ca 3.81 Å).