Synthesis of Uranium-Ligand Multiple Bonds by Cleavage of a Trityl Protecting Group

摘要

Addition of KSCPh_3 to [U(NR_2)_3] (R = SiMe_3) in tetrahydrofuran, followed by addition of 18-crown-6, results in formation of the U(Ⅳ) sulfide, [K(18-crown-6)][U(S)(NR_2)_3] (1) and Gomberg's dimer. Similarly, addition of KOCPh_3 to [U(NR_2)_3] in tetrahydrofuran, followed by addition of 18-crown-6, results in formation of the U(Ⅳ) oxide, [K(18-crown-6)][U(O)-(NR_2)_3] (3). Also observed in this transformation are the triphenylmethyl anion, [K(18-crown-6)(THF)_2][CPh_3] (5), and the U(Ⅳ) alkoxide, [U(OCPh_3)(NR_2)_3] (4).