Iron(III) acetate instance of coordination complex
Ferric acetate is the acetate salt of the coordination complex [Fe3O(OAc)6(H2O)3]+ (OAc− is CH3CO2−). Commonly the salt is known as "basic iron acetate".  The formation of the red-brown complex was once used as a test for ferric ions.Structure and synthesis
Basic iron acetate forms on treating aqueous solutions of iron(III) sources with acetate salts. A typical precursor is freshly precipitated iron oxide/hydroxide, which is halide-free.Early work showed that the cation is trinuclear. The Fe centres are equivalent, each being octahedral, being bound to six oxygen ligands, including a triply bridging oxide at the center of the equilateral triangle.  The compound was an early example of a molecular complex of iron that features an oxide ligand.  The cation has idealized D3h symmetry.
type of example of manifestation of representation of