The Front Cover shows the competition for aerobic peroxidation of organic molecules, under ambient conditions, between cobalt(III) alkylperoxo quaterpyridine complexes, [CoIII(OOR′)]2+, with different R′ groups (the structures are shown inside balloons held by children). rate RH → ROOH transformation is dependent on nature group in [CoIII(OOR’)]2+ a descending order 3o>2o>1o. More information c...

Complexes of Co(iii) containing mixed chelating diimine and o-quinone ligand sets are of fundamental interest on account of their fascinating magnetic and electronic properties. Whilst complexes of this type containing one diimine and two o-quinone ligands have been studied extensively, those with the reverse stoichiometry (two diimines and one o-quinone) are much rarer. Herein, we describe a r...

The effects of pressure and temperature on the energy (Eop) of the metal-to-metal charge transfer (MMCT, FeII-->CoIII) transition of the cyano-bridged complexes trans-[L14CoNCFe(CN)5]- and cis-[L14CoNCFe(CN)5]- (where L14=6-methyl-1,4,8,11-tetraazacyclotetradecan-6-amine) were examined. The changes in the redox potentials of the cobalt and iron metal centres with pressure and temperature were a...

Die Umsetzung des CoI-Komplexes [(TIMMNmes)CoI](PF6) (1) (TIMMNmes=tris-[2-(3-Mesityl-imidazolin-2-yliden)-methyl]amin) mit Mesitylazid ergibt das CoIII-Imid [(TIMMNmes)CoIII(NMes)](PF6) (2). Folgende Oxidation [FeCp2](PF6) ermöglicht den Zugang zu dem seltenen CoIII-Imidylkomplex [(TIMMNmes)Co(NMes)](PF6)2 (3). Einkristall-Röntgenstrukturanalyse und ESR-Spektroskopie bestätigen die molekulare ...

Biuret-modified tetraamidomacrocyclic cobalt complex [CoIII-bTAML]- is shown to catalyze electrochemical water oxidation at basic pH leading to the formation of O2. Electrochemical and spectroscopic studies indicate a high valent cobalt oxo intermediate isoelectronic to CoV(O) as the active oxidant. The kinetic isotope effect of 8.63 indicates an atom proton transfer mechanism.

RNA editing in Trypanosoma brucei is a posttranscriptional processing event that results in the addition and deletion of uridine residues within several mitochondrial mRNAs. We have examined reactions involving pre-edited precursor RNAs in vitro. In this study, we report specific cleavage of pre-edited cytochrome b (CYb), cytochrome oxidase subunit II (COII), and cytochrome oxidase subunit III ...

The Cover Feature shows light-driven hydrogen evolution mediated by cobalt(II) tripodal iminopyridine complexes, using tri(n-butyl)triazatriagulenium (TATA+) as the organic sensitizer and triethylamine (TEA) sacrificial donor in aqueous acetonitrile. activity of complexes depends highly on electronic properties substituents pyridine moieties. Under acidified conditions, for H2 production was en...

We have studied partially edited molecules for the cytochrome-c oxidase subunit III (COIII) transcript from two species of the insect trypanosome Herpetomonas. We found unexpected patterns of editing, in which editing does not proceed strictly 3' to 5', in 24 of 61 partially edited clones. A comparison of the partially edited molecules between the two kinetoplastid species revealed an 8- to 10-...