An imidazolium salt, containing two aryloxy groups, was prepared as a precursor for the tetradentate dicarbene ligand. The complexation with Mn(OAc) 2 gaVe an air-stable Mn(III) N-heterocyclic carbene complex in moderate yield. The crystal structure of the complex shows a distorted-squarepyramidal structure, in which two carbene carbon atoms and two aryloxy oxygen atoms of the tetradentate carbene ligand occupied the basal plane.
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