Cyclic iron tetracarbenes structurally resemble iron porphyrins, but the strong equatorial σ-donation results in a different electronic structure and reactivity.

No abstract

The first diiron(III,IV)-μ2-oxo tetracarbene complex is isolated and characterized by SC-XRD, UV/Vis, EPR, Evans’ NMR and elemental analysis. CV indicates the presence of a transient high-valent diiron(IV)-μ2-oxo species. Its formation...

Elucidation of different decomposition pathways of a highly active tetradentate iron–NHC epoxidation catalyst reveals direct carbene oxidation to be the decisive cause of catalyst degradation.

The first macrocyclic and abnormally coordinating, mesoionic N-heterocyclic carbene iron complex has been synthesised and characterised via ESI-MS, EA, SC-XRD, CV, NMR and UV/Vis spectroscopy. 13C-NMR spectroscopy and CV measurements...

No abstract

In this study, the energy consumption of online (streaming or video on demand) lectures is compared with on-site lectures in the case of the Garching campus of the Technical University of Munich (TUM). The energy consumption is calculated using data collected by a survey, own measurements and literature research. On-site lectures at the TUM consume up to two orders of magnitude more energy than digital formats, making any combination of both always more energy intensive than purely online lectures. Transportation turns out to be the factor with the highest energy consumption. In scenarios with a decreased impact of transportation, e.g. regarding universities with dormitories on campus, hybrid or purely on-site lectures can become more favorable in terms of energy consumption, especially if several on-site lectures are attended in one day.