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A fascinating discovery in the chemistry of ribonucleotide reductases (RNRs) has been the identification of a dimanganese (Mn2) active site in class I b RNRs that requires superoxide anion (O2.−), rather than dioxygen (O2), to access a high‐valent Mn2 oxidant. Complex 1 ([Mn2(O2CCH3)(N‐Et‐HPTB)](ClO4)2, N‐Et‐HPTB=N,N,N′,N′‐tetrakis(2‐(1‐ethylbenzimidazolyl))‐2‐hydroxy‐1,3‐diaminopropane) was synthesised...
Ungewöhnliche Reaktivität: Ein neuartiger nichtsymmetrischer Dikupferkomplex liefert die unsymmetrische Verbindung 1 O2 mit einer μ‐η1:η1‐O2‐Koordination, deren Reaktivitätsmuster sich von dem symmetrischer Analoga unterscheidet: Sie fungiert nicht als Sauerstoffatomüberträger, bindet aber Phenolat selektiv und vermittelt dessen ortho‐Hydroxylierung, was sie zu einem konzeptionell verschiedenen Tyrosinasemodell...
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