The structure of the disodium salt of the [Eu(C22H26N3O11)(H2O)](2-) c
omplex anion is isomorphous with that of the corresponding gadolinium(
III) compound. The Eu-III atom is nine-coordinate with the donor atoms
disposed at the vertices of a tricapped trigonal prism, the cap posit
ions being occupied by two N atoms of the ligand and the O atom of the
ligated water molecule.