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A Molecular Low‐Coordinate [Fe‐S‐Fe] Unit in Three Oxidation States
Author(s) -
Schneider Christian,
Demeshko Serhiy,
Meyer Franc,
Werncke C. Gunnar
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202100336
Subject(s) - crystallography , molybdenum , mössbauer spectroscopy , chemistry , nitrogenase , cleavage (geology) , sulfide , spectroscopy , ion , inorganic chemistry , materials science , nitrogen , nitrogen fixation , physics , fracture (geology) , composite material , organic chemistry , quantum mechanics
A [Fe‐S‐Fe] subunit with a single sulfide bridging two low‐coordinate iron ions is the supposed active site of the iron‐molybdenum co‐factor (FeMoco) of nitrogenase. Here we report a dinuclear monosulfido bridged diiron(II) complex with a similar complex geometry that can be oxidized stepwise to diiron(II/III) and diiron(III/III) complexes while retaining the [Fe‐S‐Fe] core. The series of complexes has been characterized crystallographically, and electronic structures have been studied using, inter alia, 57 Fe Mössbauer spectroscopy and SQUID magnetometry. Further, cleavage of the [Fe‐S‐Fe] unit by CS 2 is presented.