Crystal structure of di-aqua-tris-(benzohydrazide-κ,)(isophthalato-κ)samarium(III) nitrate.

The first benzohydrazide complex of a lanthanide is reported. In the title compound, [Sm(CHO)(CHNO)(HO)]NO, systematic name di-aqua-tris-(benzohydrazide-κ,)(isophthalato-κ)samarium(III) nitrate, the Sm ion is nine-coordinated in a distorted tricapped trigonal-prismatic geometry by three oxygen atoms and three nitro-gen atoms from three benzhydrazide (bzz) ligands, one oxygen atom from the isophthalate (itp) ligand, and two oxygen atoms from coordinated water mol-ecules. The nitrate group is disordered over two sets of sites with occupancy factors of 0.310 (17) and 0.690 (17). In the crystal, adjacent mol-ecules are linked into chains pairs of O-H⋯O and N-H⋯O hydrogen bonds between the carboxyl-ate acceptor and the coordinated water and amine NH donors. Mol-ecules are further stacked by π-π inter-actions involving the benzene ring of the itp ligands, forming double chains that extend in the -axis direction. These double chains are further linked into a three-dimensional supra-molecular network hydrogen bonds (O-H⋯O, N-H⋯O and C-H⋯O) between the complex mol-ecule and the nitrate groups along with C-H⋯π and π-π inter-actions involving the benzene rings of the bzz and itp ligands.