Manganese Manganese Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in minerals in combination with iron. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Historically, manganese is named for pyrolusite and other black minerals from the region of Magnesia in Greece, which also gave its name to magnesium and the iron ore magnetite. By the mid-18th century, Swedish-German chemist Carl Wilhelm Scheele had used pyrolusite to produce chlorine. Scheele and others were aware that pyrolusite (now known
Manganese(III) acetate Manganese(III) acetate Manganese(III) acetate describes a family of coordination complexes with the approximate formula Mn(OCCH). All are brown solids, which are soluble in acetic acid and water. These compounds are used in organic synthesis as oxidizing agents. Compounds with the formula Mn(OCCH) have not been verified. Instead manganese(III) acetate adopts the structure reminiscent of those of basic chromium acetate and basic iron acetate. For this reason, manganese(III) acetate is sometimes referred to as basic manganese acetate. The formula is [MnO(OCCH)L]X where L is a ligand and X is an anion. The coordination polymer [MnO(OCCH)]OCCHHOCCH has been crystallized. It is usually