Iron(III) acetate
Ferric acetate is the coordination compound more commonly known as "basic iron acetate". With the formula [Fe3O(OAc)6(H2O)3]OAc (OAc is CH3CO2), it is a salt, composed of the cation [Fe3(μ3-O)(OAc)6(H2O)3] and an acetate anion. The formation of the red-brown complex has long been used as a test for ferric ions.