The development of processes for the selective oxidation of hydrocarbons is a major focus in catalysis research. Making this process simultaneously environmentally friendly is still challenging. 3d transition metals are...
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...
The performance of trans axially substituted mono‐(2 a) and bis(tert‐butylisocyanide) (2 b) complexes derived from the highly active bio‐inspired iron(II) (pre‐ )catalyst 2 containing an equatorial macrocyclic tetra N‐heterocyclic carbene in homogenous olefin epoxidation catalysis is reported. H2O2 is used as oxidant in combination with the Lewis acid Sc(OTf)3 as additive resulting in a considerable improvement of catalytic activity. In contrast to other iron epoxidation catalysts, the introduction of π‐accepting isocyanide ligands does not improve the catalytic performance of 2 a and 2 b posed by cyclic voltammetry. However, besides their lower activity, a high temperature tolerance of both compounds is found as a unique feature for iron NHC epoxidation catalysts.
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