Di­aqua­bis­(di­methyl sulfoxide)­bis(2,4-di­nitro­benzoato)­cobalt(II).

The title compound, [Co(C7H3N2O6)2(C2H6OS)2(H2O)2], has been prepared and its structure established by an X-ray structure determination in order to assist the modelling of processes of chemisorption of organic salts formed by di­nitro­benzoic acids (DNBH) and secondary amines ( R2NH) by metal surfaces. The 2,4-DNB ions and di­methyl sulfoxide (DMSO) mol­ecules behave as monodentate ligands coord­inated to the Co atom through their O atoms. These ligands, together with two mol­ecules of water, form a slightly distorted octahedral coordination environment for the Co atom which is disposed at a centre of symmetry. [ABSTRACT FROM AUTHOR]