Preparation, Spectroscopic Characterization, and Reactivity of High-Valent Non-Oxo Co(IV) and Formally Co(V) Complexes.

ABSTRACT: In the presence of artificial oxidants, high-valent Co-X (X = O and NTs) complexes can be achieved in many different types of ligand structures. This paper reports, for the first time, the synthesis, spectroscopic and theoretical characterization, and reactivity of formally Co-(V) and Co-(IV) intermediates without the axial oxo or imido groups by using a strongly electron-donating ligand, PCAPD (PCAPD = bis-[2-(1H-pyrrol-2-carboxamido)-o-phenylenediamine). The formally Co-(V) complex was prepared by reacting [Et₄N]₂[Co^III(PCAPD)-(Cl)] with iodosylbenzene (PhIO) as an artificial oxidant in acetone at -40 °C. Then, the formally Co-(V) complex was characterized with various spectroscopic methods, such as EPR, CSI-MS, MCD, XAS, and EXAFS, revealing a dia

SUBMITTER: Yang J 

PROVIDER: S-EPMC12308381 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature