Reported is the first example of a ruthenium(III) complex, RuIII(edta) (edta4− = ethylenediaminetetraacetate), that catalyzes the disproportion of H2O2 to O2 and water in resemblance to catalase activity, and shedding light on the possible mechanism of action of the [RuV(edta)(O)]− formed in the reacting system.
![Graphical abstract: Direct evidence for catalase activity of [RuV(edta)(O)]−](http://hg.y866.cn/compound/lib/scimg/usr/1/C4CC06631F.jpg)
