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Reaction scheme for the formation of 3:1 site-differentiated clusters (24, 25, 28) with unidentate terminal ligands derived from bis(trimethylsilyl)amide clusters 13 and 26 (adapted from ref. 66). Three [Fe4S4]n oxidation states are represented: n = 4+ (13), 3+ (24–27), 2+ (28).
