Isolation of a TMTAA-Based Radical in Uranium bis-TMTAA Complexes.
Stephan HohlochMary E GarnerCorwin H BoothWayne W LukensColin A GouldDaniel J LussierLaurent MaronJohn ArnoldPublished in: Angewandte Chemie (International ed. in English) (2018)
We report the synthesis, characterization, and electronic structure studies of a series of thorium(IV) and uranium(IV) bis-tetramethyltetraazaannulene complexes. These sandwich complexes show remarkable stability towards air and moisture, even at elevated temperatures. Electrochemical studies show the uranium complex to be stable in three different oxidation states; isolation of the oxidized species reveals a rare case of a non-innocent tetramethyltetraazaannulene (TMTAA) ligand.