The title compound, [Cd(C(11)H(5)N(2)O(2))(2)(H(2)O)(2)], is a mononuclear complex consisting of a Cd(II) atom, two 3-hydr-oxy-4,5-diaza-fluoren-9-one ligands and two coordinated water mol-ecules. The Cd(II) atom, lying on a twofold axis, displays a distorted octa-hedral coordintion. Adjacent mol-ecules are linked by O-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distance = 3.84 (1) Å], leading to a one-dimensional chain. Weak C-H⋯O hydrogen bonds connect the chains into a two-dimensional supra-molecular structure.
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