Redetermination of di­aqua­tris­(4-oxo­pent-2-en-2-olato-κ²O,O′)lanthanum(III)

The structure of the title compound, [La(C₅H₇O₂)₃(H₂O)₂], has been redetermined to modern standards with anisotropic displacement parameters for all non-H atoms and the hydrogen-bonding pattern unambiguously established [for the previous study, see Phillips et al. (1968). Inorg. Chem. 7, 2295–2299]. The La³⁺ ion is coordinated by three O,O′-bidentate acetyl­acetate (acac⁻) ligands and two water mol­ecules, resulting in a fairly regular square-anti­prismatic LaO₈ coordination geometry, with both aqua ligands part of the same square face. In the crystal, the neutral complex mol­ecules are linked into [110] chains by O—H...O hydrogen bonds.