Effects of coordinating heteroatoms on molecular structure, thermodynamic stability and redox behavior of uranyl(vi) complexes with pentadentate Schiff-base ligands.

ABSTRACT: Uranyl(vi) complexes with pentadentate N₃O₂-, N₂O₃- and N₂O₂S₁-donating Schiff base ligands, tBu,MeO-saldien-X^2- (X = NH, O and S), were synthesized and thoroughly characterized by ¹H NMR, IR, elemental analysis, and single crystal X-ray diffraction. The crystal structures of UO₂(tBu,MeO-saldien-X) showed that the U-X bond strength follows U-O ≈ U-NH > U-S. Conditional stability constants (β _X) of UO₂(tBu,MeO-saldien-X) in ethanol were investigated to understand the effect of X on thermodynamic stability. The log β _X decrease in the order of UO₂(tBu,MeO-saldien-NH) (log β _NH = 10

SUBMITTER: Takeyama T 

PROVIDER: S-EPMC9413499 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature