Diaquabis(2-oxo-2H-chromene-3-carboxylato-κ²O²,O³)cadmium

Abstract

In the title mononuclear cadmium complex, [Cd(C10H5O4)2(H2O)2], the CdII atom, located on a crystallographic inversion center, exhibits a slightly distorted octa­hedral geometry and is six-coordinated by two O atoms from water mol­ecules in the axial positions and four O atoms from two deprotonated coumarin-3-carb­oxy­lic acid ligands in the equatorial plane. Angles around the CdII atom vary between 81.00 (5) and 99.00 (0)°. The Cd—O bond lengths vary between 2.1961 (13) and 2.3360 (13) Å. O—H⋯O hydrogen bonds between the H atoms of coordinated water mol­ecules and the O atoms of carboxyl­ate groups link the complex mol­ecules into layers parallel to the ab plane.