Manganese heptoxide
Manganese heptoxide is a dark-green, volatile liquid with formula Mn₂O₇. It is the acid anhydride of permanganic acid and a powerful oxidizing agent.
Permanganic acid: Permanganic acid is the strong, unstable acid with formula HMnO₄. Removing water from permanganic acid yields manganese heptoxide.
Potassium permanganate: Potassium permanganate is a purple crystalline salt with formula KMnO₄ and strong oxidizing properties. It is a common permanganate starting material for preparing Mn₂O₇ with concentrated sulfuric acid.
Manganese dioxide: Manganese dioxide is a dark solid with formula MnO₂, in which manganese has oxidation state +4. Unlike volatile Mn₂O₇, MnO₂ is a comparatively stable, widely used manganese oxide.
Eugen Bamberger: Eugen Bamberger was a German chemist known for research in organic chemistry and aromatic compounds. Bamberger investigated manganese heptoxide and reported its explosive behavior.
Manganese oxidation states: Manganese oxidation states describe the formal charges manganese adopts in compounds and ions. Manganese is in the +7 oxidation state, its highest common state, in Mn₂O₇.
Sulfuric acid: Sulfuric acid is a strong, diprotic mineral acid with formula H₂SO₄. Concentrated sulfuric acid helps liberate permanganic acid from permanganate salts.
Chromium trioxide: Chromium trioxide is a dark red solid, CrO₃, and a powerful oxidizing agent. Both are high-valent metal oxides, but CrO₃ is a solid rather than a volatile liquid.
Inorganic synthesis: Inorganic synthesis is the preparation of compounds that are not primarily based on carbon frameworks. Mn₂O₇ is prepared by acidifying permanganate salts under carefully controlled conditions.
Oxidizing agent: An oxidizing agent accepts electrons from another substance and is itself reduced. Mn₂O₇ oxidizes other substances while manganese is reduced.
Organic oxidation: Organic oxidation is the increase in oxidation level of an organic molecule through electron loss or bond changes. Mn₂O₇ can oxidize organic compounds, but its violence makes it unsuitable for routine oxidation.