A new lanthanum(III) complex containing acetyl-acetone and 1 H -imidazole.

In the title complex, di-aqua-(1 H -imidazole-κ N 3 )(nitrato-κ2 O , O ')bis-(4-oxo-pent-2-en-2-olato-κ2 O , O ')lanthanum(III), [La(C5 H7 O2 )2 (NO3 )(C3 H4 N2 )(H2 O)2 ], the La atom is coordinated by eight O atoms of two acetyl-acetonate (acac) anions acting as bidentate ligands, two water mol-ecule as monodentate ligands, one nitrate anions as a bidentate ligand and one N atom of an imidazolate (ImH) molecule as a monodentate ligand. Thus, the coordination number of the La atom is nine in a monocapped square anti-prismatic polyhedron. There are three types of inter-molecular hydrogen bonds between ligands, the first involving nitrate-water O⋯H-O inter-actions running along the [001] direction, the second involving acac-water O⋯H-O inter-actions along the [010] direction and the third involving an Im-nitrate N-H⋯O inter-action along the [100] direction (five inter-actions of this type). Thus, an overall one-dimensional network structure is generated. The mol-ecular plane of an ImH molecule is almost parallel to that of a nitrate ligand, making an angle of only 6.04 (12)°. Inter-estingly, the ImH plane is nearly perpendicular to the planes of two neighbouring acac ligands.