Michael Haumann

The effect of a pendant neutral alcohol moiety in the N-alkylated cyclam (1,4,8,11-tetraazacyclotetradecane) ligand backbone is examined for the non-heme mononuclear oxoiron(IV) unit in [FeIV(Osyn)(TMC-HOR)(NCCH3)]2+ (1-syn) (TMC-HOR = 2-(4,8,11-trimethyl-1,4,8,11-tetraazacyclotetradecan1-yl)ethan-1-ol). Unlike...

Electrocatalysts support crucial industrial processes and emerging decarbonization technologies, but their design is hindered by structural and compositional changes during operation, especially at application-relevant current densities. Here we use operando...

We report hitherto elusive side-on η-bonded palladium(0) carbonyl (anthraquinone, benzaldehyde) and arene (benzene, hexafluorobenzene) palladium(0) complexes and present the catalytic hydrodefluorination of hexafluorobenzene by cyclohexene. The comparison with respective cyclohexene,...

This study deals with the unprecedented reactivity of a [(cyclam)Mn(OTf)] (3-cis; OTf = CFSO) with O, which, depending on the presence or absence of a hydrogen atom donor like 1-hydroxy-2,2,6,6-tetramethyl-piperidine...

The diiron(II) complex, [(OCO)Fe(MeCN)] (, MeCN = acetonitrile), supported by the bis-phenolate carbene pincer ligand, 1,3-bis(3,5-di--butyl-2-hydroxyphenyl)benzimidazolin-2-ylidene (OCO), was synthesized and characterized by single-crystal X-ray diffraction, H nuclear magnetic resonance, infrared...

Cytochrome oxidase (CcO) is a heme copper oxidase (HCO) that catalyzes the natural reduction of oxygen to water. A profound understanding of some of the elementary steps leading to the...

Earth abundant metal-based heterogeneous catalysts with highly active and at the same time stable isolated metal sites constitute a key factor for the advancement of sustainable and cost-effective chemical synthesis....

Oxide-derived copper (OD-Cu) materials exhibit extraordinary catalytic activities in the electrochemical carbon dioxide reduction reaction (CORR), which likely relates to non-metallic material constituents formed in transitions between the oxidized and...

Merely all transition-metal-based materials reconstruct into similar oxyhydroxides during the electrocatalytic oxygen evolution reaction (OER), severely limiting the options for a tailored OER catalyst design. In such reconstructions, initial constituent...

The NO macrocycle of the 12-TMCO ligand stabilizes a high spin ( = 5/2) [Fe(12-TMCO)(OOBu)Cl] (3-Cl) species in the reaction of [Fe(12-TMCO)(OTf)] (1-(OTf)) with -butylhydroperoxide (BuOOH) in the presence of...