Transition metal–sulfur (M–S) compounds are an indispensable means for biological
systems to convert N2 into NH3 (biological N2 fixation), and these may have emerged by …

The ubiquity, structural variation, and functional diversity of iron-sulfur (Fe-S) clusters in
biological environments has long fascinated scientists. In nature, Fe-S clusters form a variety …

Radical S-adenosyl-l-methionine (SAM) enzymes employ a [4Fe–4S] cluster and SAM to
initiate diverse radical reactions via either H-atom abstraction or substrate adenosylation …

The iron–molybdenum cofactor of nitrogenase (FeMoco) catalyzes fixation of N2 via Fe
hydride intermediates. Our understanding of these species has relied heavily on the …

Cuboidal [Fe4S4] clusters are ubiquitous cofactors in biological redox chemistry. In the
[Fe4S4] 1+ state, pairwise spin coupling gives rise to six arrangements of the Fe valences …

The high affinity of sulfur (S) for transition metal ions (M), as well as the flexible M− S
bonding and bridging modes, enable the formation of a wide range of multi-metallic …

We report the synthesis and characterization of the first terminal imido complex of an Fe–S
cluster,(IMes) 3Fe4S4= NDipp (2; IMes= 1, 3‐dimesitylimidazol‐2‐ylidene, Dipp= 2, 6 …

Iron compounds containing a bridging oxo or sulfido moiety are ubiquitous in biological
systems, but substitution with the heavier chalcogenides selenium and tellurium, however, is …

The reduction of dinitrogen (N2) is essential for its incorporation into nucleic acids and
amino acids, which are vital to life on earth. Nitrogenases convert atmospheric dinitrogen to …

Alkyl-ligated iron–sulfur clusters in the [Fe4S4] 3+ charge state have been proposed as short-
lived intermediates in a number of enzymatic reactions. To better understand the properties …