Aqua­tris­[1-(2,4-dioxo-2H-1-benzo­pyran-3-yl­idene)ethan-1-olato]ethano­lgadolinium(III) ethanol monosolvate

The title compound, [Gd(C11H7O4)3(C2H5OH)(H2O)]·C2H5OH, was crystallized from ethanol, affording a solvate. The main ligand in the complex results from deprotonation of the hy­droxy group in 3-acetyl-4-hy­droxy­coumarin (C11H8O4) and the resulting anionic ligands chelate the GdIII centre. Three anions, one ethanol and one water mol­ecule are bonded to the lanthanide, giving an eight-coordinate metal centre with a slightly distorted trigonal–prismatic square-face-bicapped coordination geometry. All water and ethanol mol­ecules participate in an intricate three-dimensional framework of hydrogen bonds. The complex is isostructural to the Tb and Dy compounds reported previously [Guzman-Mendez et al. (2018). Inorg. Chem. 57, 908–911].