Initial Synthesis and Structure of an All-Ferrous Analogue of the Fully Reduced [ Fe4 S4]0 Cluster of the Nitrogenase Iron Protein

The synthetic cubane-type iron-sulfur clusters [ Fe4 S4( SR)4]z form a four-member electron transfer series (z = 3-, 2-, 1-, and 0), all members of which except that with z = 0 have been isolated and characterized. They serve as accurate analogues of protein-bound [ Fe4 S4( SCys)4]z redox centers, w...

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