Health & Environmental Research Online (HERO)


Print Feedback Export to File
1617946 
Journal Article 
Highly efficient oxidation of alcohols by the system "hydrogen peroxide-[LMn(O)(3)MnL](PF6)(2) (L=1,4,7-trimethyl-1,4,7-triazacyclononane)-oxalic acid" 
dos Santos, VA; Shul'pina, LS; Veghini, D; Mandelli, D; Shul'pin, GB 
2006 
0 
Reaction Kinetics and Catalysis Letters
ISSN: 0133-1736 
88 
2 
339-348 
WOS:000239050100018 
The dinuclear manganese(IV) complex [LMn(O)(3)MnL](PF6)(2)
(1, L = 1,4,7-trimethyl-1,4,7-triazacyclononane) catalyzes the extremely efficient oxidation of
alcohols with hydrogen peroxide at room temperature. Oxalic acid is an obligatory co-catalyst.
The oxidation of isopropanol, for example, yields acetone with turnover numbers up to 40000 after
5-10 h in the absence of a solvent. 2-Cyanoethanol was oxidized by this system with somewhat
lower efficiency (conversion 70%). The catalytically active cation from salt 1 was obtained in an
insoluble form containing a heteropoly anion [Mn2O3(TMTACN)(2)](2)[SiW12O40]. Oxidation of 2-
cyanoethanol using this heterogenizedcatalyst and oxalic acid gave the oxo-products with the 54%
total yield. 
alcohols; oxidation; hydrogen peroxide; homogeneous catalysis; manganese complexes