Ligand Design Criteria for the Stability of High Oxidation State Praseodymium Complexes.

ABSTRACT: The isolation of high-oxidation-state lanthanide complexes requires a balance of electron-donating ligand environment, steric protection, and ligand redox stability. Herein, we report the synthesis of a new imidophosphorane ligand, NPC² ([NP(^tBu)₂(pyrr)]^-; pyrr = pyrrolidinyl), and its ability to support homoleptic Ce³⁺ and Pr³⁺ complexes that afford access to Ce⁴⁺ and electrochemically observable Pr⁴⁺ and Pr⁵⁺. The structures, electrochemistry, and computational analyses of tetrahomoleptic NPC² complexes of Ce³⁺, Ce⁴⁺, and Pr³⁺ are compared with previously reported analogues supported by NP^*

SUBMITTER: Nero TR 

PROVIDER: S-EPMC12848976 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature