An Iron(III) Superoxide Corrole from Iron(II) and Dioxygen

A new structurally characterized ferrous corrole [Fe-II(ttppc)](-) (1) binds one equivalent of dioxygen to form [Fe-III(O-2(-center dot))(ttppc)](-) (2). This complex exhibits a O-16/18(2)-isotope sensitive n(O-O) stretch at 1128 cm(-1) concomitantly with a single n(Fe-O-2) at 555 cm(-1), indicating it is an eta(1)-superoxo (end-on) iron(III) complex. Complex 2 is the first well characterized Fe-O-2 corrole, and mediates the following biologically relevant oxidation reactions: dioxygenation of an indole derivative, and H-atom abstraction from an activated O-H bond.

Automated summary

A new ferrous corrole complex [Fe-II(ttppc)](-) has been shown to bind dioxygen to form Fe-O-2, exhibiting an O-16/18(2)-isotope sensitive n(O-O) stretch at 1128 cm(-1) and a single n(Fe-O-2) at 555 cm(-1). This complex can mediate the dioxygenation of an indole derivative and extract hydrogen atoms from activated O-H bonds.