Topic summary
Fe(III)
Extracted from the Wikipedia article Ferric.
Although often abbreviated as Fe, that naked ion does not exist except under extreme conditions. Iron(III) centres are found in many compounds and coordination complexes, where Fe(III) is bonded to several ligands. A molecular ferric complex is the anionferrioxalate, [Fe(C2O4)3], with three bidentateoxalate ions surrounding the Fe core. Relative to lower oxidation states, ferric is less common in organoiron chemistry, but the ferrocenium cation [Fe(C5H5)2] is well known.