The influence of net charge on the redox potentials of Fe4S4 cubane-type clusters in aprotic solvents

Developments in the Biomimetic Chemistry of Cubane-Type and Higher Nuclearity Iron–Sulfur Clusters

“…Although this state has been detected electrochemically as [Fe 4 S 4 (SR) 4 ] 4− ( E ½ 4−/3− ≲ −1.6 V), 31 no synthetic cluster of any type had ever been isolated owing to extreme oxidative instability. Synthetic access to these clusters was achieved in 2005–2008 by reaction schemes [1] and [2] in Figure 3.…”

Stabilization of Fully Reduced Iron−Sulfur Clusters by Carbene Ligation: The [FenSn]0 Oxidation Levels (n = 4, 8)

“…Certain of these clusters can be further reduced reversibly or quasireversibly to [Fe 4 S 4 (SR) 4 ] 4−,18 thereby providing evidence for the [Fe 4 S 4 ] 0 state early in the development of analogue chemistry19–21 and thereafter 18. Because these clusters are formed at potentials E 1/2 4−/3− ≤ −1.6 V vs SCE in acetonitrile or DMF,18 they are highly sensitive to oxidizing impurities. Despite multiple attempts in this laboratory, no pure fully reduced thiolate cluster has ever been isolated.…”

Dimerization of 1-Phenyl-1<i>H</i>-Tetrazole-5-Thiol over Metalloporphyrin Catalysts

“…In 4-thiouridine's biosynthesis, evidences proved that the biological sulfur was transferred via persulfide groups [17]. In the biomimic preparations of [Fe 4 S 4 ] clusters, RSH compounds were partially converted into RSSR disulfanes [18][19][20], and these evidences were beneficial for exploring the forming mechanism of [Fe 4 S 4 ] clusters. As far as we know, there was no disulfane's preparation over metalloporphyrin catalysts has been reported.…”