41543-19-5Relevant academic research and scientific papers
RETRACTED ARTICLE: Substitution reactions of diiron dithiolate complexes with phosphine or isocyanide ligands
Liu, Xu-Feng
, p. 117 - 124 (2014)
A series of diiron dithiolate complexes bearing phosphine or isocyanide ligands, as the active site models of [FeFe]H2ases, has been prepared by carbonyl substitution and structurally characterized. While complexes [(μ-EDT)Fe2(CO)5L1] (EDT = SCH 2CH2S, L1 = PPh3, 3; Ph 2PCH2PPh2, 4; tBuNC, 5) were prepared by reactions of (μ-EDT)Fe2(CO)6 (1) with PPh3, Ph2PCH2PPh2 (dppm), or tBuNC in the presence of Me3NO·2H2O in MeCN in 52-82% yields, complex (μ-EDT)Fe2(CO)4( tBuNC)2 (6) was produced by reaction of 1 with 2 equivalents of tBuNC in CH2Cl2 in 42% yield. Treatment of 1 or (μ-PDT)Fe2(CO)6 (PDT = SCH 2CH2CH2S) (2) with Me3NO· 2H2O followed by addition of 4-PyN(PPh2)2 (Py = C5H4N) gave unexpected products (μ-EDT)Fe 2(CO)5[Ph2PP(O)Ph2] (7), (μ-EDT)Fe2(CO)5(Ph2PNHPy-4) (8), (μ-PDT)Fe2(CO)5[Ph2PP(O)Ph2] (9), and (μ-PDT)Fe2(CO)5(Ph2PNHPy-4) (10) in 20-38% yields, respectively. In addition, the asymmetrically disubstituted complex (μ-EDT)Fe2(CO)4(Ph2PCH 2CH2PPh2) (11) was obtained by reaction of 1 with Ph2PCH2CH2PPh2 (dppe) in refluxing xylene in 31% yield, whereas reaction of 2 with 1,1′- bis(diphenylphosphino)ferrocene (dppf) in refluxing xylene afforded the symmetrically disubstituted complex (μ-PDT)Fe2(CO) 4[(η5-Ph2PC5H4) 2Fe] (12) in 28% yield. The complexes 3-9, 11, and 12 were characterized by elemental analysis, IR, and NMR spectroscopy, as well as for 3-7, 9, 11, and 12 by X-ray crystallography.
Synthesis, Molecular Structures and Electrochemical Investigations of [FeFe]-Hydrogenase Biomimics [Fe2(CO)6-n(EPh3)n(μ-edt)] (E = P, As, Sb; n = 1, 2)
Ghosh, Shishir,Rahaman, Ahibur,Orton, Georgia,Gregori, Gregory,Bernat, Martin,Kulsume, Ummey,Hollingsworth, Nathan,Holt, Katherine B.,Kabir, Shariff E.,Hogarth, Graeme
, p. 4506 - 4515 (2019)
A series of ethane-dithiolate (edt = S(CH2)2S) complexes [Fe2(CO)5(EPh3)(μ-edt)] and [Fe2(CO)4(EPh3)2(μ-edt)] (E = P, As, Sb), biomimics of the core of [FeF
Synthesis and structural characterization of diiron ethanedithiolate complex [(μ-SCH2)2Fe2(CO)4](PPh3)2related to the active site of [Fe-Fe]-hydrogenases
Gao, Wei,Zhang, Ting-Ting,Sun, Yan-Jun
, p. 6687 - 6688 (2014)
A diiron ethanedithiolate complex [(μ-SCH2)2Fe2(CO)4](PPh3)2(1), as the active site of [Fe-Fe]-hydrogenases, has been prepared and characterized. The title complex was prepared by reaction of [(μ-SCH2)2]Fe2(CO)6( A) with PPh3 at reflux in xylene in 50% yield. The new complex was characterized by IR, 1H NMR, 31P NMR and 13C NMR spectroscopy.
Bio-inspired hydrogenase models: Mixed-valence triion complexes as proton reduction catalysts
Ghosh, Shishir,Hogarth, Graeme,Holt, Katherine B.,Kabir, Shariff E.,Rahaman, Ahibur,Unwin, David G.
, p. 11222 - 11224 (2011/11/29)
Mixed-valence triiron complexes Fe3(CO)7-x(PPh 3)x(μ-edt)2 (x = 0-2) have been prepared and are shown to act as proton reduction catalysts. Catalysis takes place via an ECEC mechanism with a reduced overpotential of ca. 0.45 V for Fe 3(CO)7(μ-edt)2 as compared to the corresponding diiron complex.
