Mono- and di-substituted [FeFe]-hydrogenase H-cluster mimics bearing the 3,4-dimercaptobenzaldehyde bridge moiety: Insight into synthesis, characterization and electrochemical investigations

Abul‐Futouh, Hassan; Costabel, Daniel; Hotzel, Konrad; Liebing, Phil; Görls, Helmar; Weigand, Wolfgang; Peneva, Kalina

doi:10.1016/j.ica.2023.121469

Cited by 2 publications

(1 citation statement)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is obvious that the replacement of one carbonyl by various phosphanes affects the Fe-Fe bond lengths and could be tentatively related to their σ-electron-donor power (pKa(PPh 3 ) = 2.73 and (pKa(P(OMe) 3 ) = 2.6) [17]. On the other hand, it should also be noted that reverse effects on the Fe-Fe distance are observed for di-substituted derivatives in other close di-iron species, for example, the compounds [Fe 2 (CO) 4 L 2 (µ-bdtf] (bdtf = 3,4 dimercaptobenzaldehyde) (L = PPh 3 , P(OMe) 3 ) [18]. This shows that such slight effects are the result of very fine electronic and steric balance depending on the nature of the thiolate bridge, the characteristics (θ, pKa) of the phosphanes, their number and the geometry of the considered isomer, rendering rationalization quite intricate.…”

Section: Resultsmentioning

confidence: 99%

Mono- and Dinuclear Carbonyl Dithiolene Complexes Related to the [FeFe]-Hydrogenases

Kdider,

Elleouet,

Pétillon

et al. 2023

Molbank

View full text Add to dashboard Cite

The di-iron carbonyl dithiolene bridged complex [Fe2(CO)6(µ-S2C2(CO2Me)2)] (1) reacts with 1 equivalent of phosphane PR3 (R = Ph, OMe) to give, as major products, monosubstituted derivatives [Fe2(CO)5L(µ-S2C2(CO2Me)2)] (L = PPh3 (2), P(OMe)3 (3)). In the presence of an excess (3–4 equiv.) of P(OMe)3, the cleavage of 1 arises partly and a mixture of the mononuclear species [Fe(CO)(P(OMe)3)2(κ2-S2C2(CO2Me)2)] (4) and 3 is obtained. The compounds 2–4 were analyzed by IR and 1H, 31P-{1H} NMR spectroscopies. Their structures in solid state were determined by X-ray diffraction analyses, which accord with their spectroscopic characteristics.

show abstract

Section: Resultsmentioning

confidence: 99%