Potassium bis(oxalato) diaqua chromate (III) dihydrate

                        KCr(C2O4)2(H2O)22H2O

 

 

This is potassium bis(oxalato)chromate (III), synthesized from potassium dichromate and oxalic acid. This complex is very similar to potassium tris(oxalato)chromate (III), but its physical appearance differs quite a lot. The main difference is that here only four aqua ligands of the plain hexaaqua chromium (III) are replaced by two oxalato ligands.