Manganese(III) acetate

Manganese(III) acetate or Manganese triacetate is an inorganic chemical that is usually found as the dihydrate, and often smells of acetic acid. Its structural formula is represented as C₆H₉MnO₆^.2(H₂O). Anhydrous Manganese triacetate has been crystallised from acetic acid and the structure has been assigned as an oxo-centred trimer^[1] with several bridging acetates.^[2] Pure manganese trihydrate can be obtained by removal of water from the dihydrate.

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Manganese triacetate is usually prepared from potassium permanganate and manganeous acetate in acetic acid.^[3]

Mangese triacetate has been used as a single electron oxidant. It has been shown to oxidise oxidation of enones to give α'-acetoxy enones ^[4][5] It has also been used to oxidise α-alkyl β-keto esters,^[6] and a variety of other 1,3 dicarbonyl compounds, via single electron transfer from Mn(III) to the dicarbonyl, generating Mn(II).

References

1. ^ Hessel, L. W., and Romers, C., Recl. Trav. Chim. Pays-Bas, 1969, 88, 545 – 552
2. ^ Fristad, W. E., Peterson, J. R. J. Org. Chem. 1985, 50, 10-17.
3. ^ Conolly, J. W., Urry, G. Inorg. Chem. 1963, 2, 645-646.
4. ^ G. J. Williams and N. R. Hunter, Can. J. Chem. 1976, 54, 3830
5. ^ Norma K. Dunlap, Mark R. Sabol, and David S. Watt, Terrahedron Letters 1984, 25, 5839-5842
6. ^ Snider, B. B., Patricia, J. J., Kates, S. A. J. Org. Chem. 1988, 53, 2137-2141.