Bonding Trends in Pyridine-2-thiolato Complexes of Tetravalent Actinides.

ABSTRACT: Complexes of tetravalent actinides (An: Th, U, Np, and Pu) with the bidentate (N,S)-donor ligand pyridine-2-thiolate (2-PyS, PyS^-) were synthesized in 1:4 or 1:5 ratios. This includes the first structurally characterized Np complex with (N,S)-donor ligands, filling a notable gap in the An coordination chemistry. An improved synthetic approach with PyS-SiMe₃ enabled efficient formation of the 1:4 complexes in THF as a coordinating solvent. The compounds were comprehensively characterized in solution and in the solid phase, supported by quantum chemical calculations. Experimental and theoretical results show matching trends in the binding behavior of An^IV. The covalent bond contributions in An-N and An-S bonding increase along the series of An f

SUBMITTER: Balas J 

PROVIDER: S-EPMC12606716 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature