budullewraagh Posted November 26, 2004 Share Posted November 26, 2004 we all know permanganates exist, but little is said/found of manganates. seriously. do a search online for manganates and all you will find are manganate (VII) which are really just permanganates. i found one site that mentioned the electrolytic oxidation of manganates...but theyre not even listed in the merck index and i cant find them on chemfinder. anybody know why theyre so elusive? Link to comment Share on other sites More sharing options...
Tetrahedrite Posted November 26, 2004 Share Posted November 26, 2004 I can answer that. The common oxidation states for Mn are 0, +2, +3, +4, +6, and +7. Starting from the bottom, Mn(0) is obviously metallic manganese. Mn2+ is most stable as the isolated Mn2+(aq) ion and therefore doesn't bond with oxygen to form manganates. Mn3+ is fairly unstable and usually reverts back to Mn2+. Mn4+ is extremely stable with oxygen, but doesn't form ions, it forms the solid MnO2 (pyrolusite is its mineral name). The manganate ion MnO4 2- (which is Mn6+) does exist but only forms in a very narrow eH range and is therefore not very common. And then Mn7+ is as you know the permanganate ion. Link to comment Share on other sites More sharing options...
budullewraagh Posted November 26, 2004 Author Share Posted November 26, 2004 i get moderately confused when there are such reactions involving permanganates oxidizing alcohols to organic acids though. got any idea of the reaction? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now