In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Model compound of [FeFe]-hydrogenase active site employing [2Fe-2S] subunit as non-innocent [4Fe-4S] cluster and its proton reduction performance, published in 2020-04-17, which mentions a compound: 1663-45-2, Name is 1,2-Bis(diphenylphosphino)ethane, Molecular C26H24P2, Recommanded Product: 1,2-Bis(diphenylphosphino)ethane.
Synthesis of model compound of [FeFe]-hydrogenase active site is a promising and effective method to produce hydrogen. [μ-(SCH(CH2CH3)CH2S)-Fe2(CO)5]2-(κ1-DPPE) (compound 1) and [μ-(SCH(CH2CH3)CH2S)] Fe2(CO)5 (κ1-DPPM) (compound 2) were designed and synthesized. Compared 1 and 2 via IR, X-ray single crystal diffraction and CV, it was found that even through 1 and 2 shared similar electronic environment as well as crystal structure features, 1 with two sym. [2Fe-2S] subsites had distinct reduction peaks and also showed higher electrocatalytic proton reduction efficiency in the presence of equivalent amount of HOAc, which indicated two sym. [2Fe-2S] subsites played different roles in the process of proton reduction Furthermore, -(κ1-DPPE)-[2Fe-2S] moiety with variable valence state in 1 can mimic the [4Fe-4S] cluster and serve as an electron shuttle.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis