Isolation of a TMTAA‐Based Radical in Uranium bis‐TMTAA Complexes. Issue 49 (8th November 2018)

• Record Type: Journal Article
• Authors: Hohloch, Stephan; Garner, Mary E.; Booth, Corwin H.; Lukens, Wayne W.; Gould, Colin A.; Lussier, Daniel J.; Maron, Laurent; Arnold, John
• Is Part Of: Angewandte Chemie international edition. Volume 57:Issue 49(2018)
• Page Start: 16136
• Page End: 16140
• Publication Date: 2018-11-08
• Subjects: macrocycles -- non-innocent ligands -- thorium -- TMTAA -- uranium; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201810971
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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. Abstract : Heavy and Guilty : Thorium(IV) and uranium(IV) bis‐tetramethyltetraazaannulene (TMTAA) complexes were synthesized and characterized. Electrochemical studies show the uranium complex to be stable in three different oxidation states; isolation of the oxidized species reveals a non‐innocent TMTAA ligand.