Nitrogen Subvalency in a Four-Member Redox Series of Iron-Sulfur Cluster Imido Complexes.

ABSTRACT: Imido complexes of high-spin 3d metals can feature N subvalency, wherein configurations with hole character at N contribute significantly to the ground state electronic structure. Reported herein are the synthesis and characterization of a series of Fe-S cluster terminal imido complexes isolated in four charge states, [(IMes)₃Fe₄S₄(NAr)]ⁿ (IMes, 1,3-dimesitylimidazol-2-ylidene; Ar = 2,4,6-tri-tert-butylphenyl; n = 1-, 0, 1+, 2+), in which the weak, trigonal ligand field of the sulfides enforces high-spin configurations at the Fe sites. It is shown that whereas the ground states of the anionic and neutral members of the series feature dominant imide ([NAr]^2-) character, the mono- and dicationic clusters have signifi

SUBMITTER: Sridharan A 

PROVIDER: S-EPMC12803629 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature