Thorium(IV) and Uranium(IV) Thioether and Selenoether Complexes: Synthesis and An–ER2 (E = S, Se) Bonding Comparison

Reactions of the rigid thioether- and selenoether-containing ligand salts [{Li(AE₂^Ph2)}₂] (E = S or Se; AE₂^Ph2 = 4,5-bis(phenylchalcogenido)-2,7,9,9-tetramethylacridanide) with ThCl₄(dme)₂ or UCl₄ (for E = Se) afforded the actinide chalcogenoether complexes [(AE₂^Ph2)₂ThCl₂] (E = S (1), Se (2)), and [(ASe₂^Ph2)₂UCl₂] (3). X-ray crystal structures of 1-3 revealed tetravalent actinide cations complexed to two κ³-coordinated AE₂^Ph2 ligands, with …