Bis(4-formylbenzoato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)cadmium(II)-bis(μ2-4-formylbenzoato-κ2O:O′)bis[(4-formylbenzoato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)cadmium(II)] (1/1)

The title compound, [Cd(C8H5O3)(2)(C12H8N2)][Cd-2(C8H5O3)(4)(C12H8N2)(2)], having the empirical formulation bis( 4- formylbenzoato)(1,10-phenanthroline)cadmium(II), is a 1/1 cocrystal consisting of mononuclear and dinuclear molecules. In the monomeric molecule that lies on a special position of site symmetry 2, cadmium is chelated by the N-heterocycle as well as by both carboxylate units in a cis-octahedral geometry. The dimeric molecule lies on another special position of site symmetry 2 that relates two monomeric units; the octahedral Cd atom is chelated by one carboxylate group and the N-heterocycle; the other carboxylate group functions as a carboxylate bridge between the two metal atoms.