In an article, published in an article, once mentioned the application of 12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene,molecular formula is C34H28FeP2, is a conventional compound. this article was the specific content is as follows.category: chiral-phosphine-ligands
Syntheses, characterization, redox properties, and mixed-valence chemistry of tetra- and hexanuclear diyndiyl complexes
A series of Ru2IIFe2II heterotetranuclear sigma-acetylide complexes [{Cp(dppf)Ru} 2(C?C-R-C?C)] (dppf = 1,1′-bis(diphenylphosphino) ferrocene, R = 0, 1; 1,4-benzenediyl, 2; 1,4-naphthalenediyl, 3; 9,10-anthracenediyl, 4) were prepared and characterized by elemental analyses, ES-MS spectrometry, IR, 1H and 31P NMR, and UV-vis-NIR spectroscopy, and cyclic and differential pulse voltammetry. Reaction of 1 with [Cu(MeCN)4](ClO4) gave Ru2II-Fe 2IICu2I heterohexanuclear compound [{Cp(dppf)Ru}2{Cu(MeCN)}2(C?C-C?C)](ClO 4)2 [5(ClO4)2] through pi-bonding of the acetylides to CuI centers. The structures of 1 and 5(ClO 4)-(SbF6) were determined by X-ray crystallography. Chemical oxidation of 1, 3, and 4 with an equivalent of ferrocenium hexafluorophosphate gave one-electron-oxidized species [{Cp(dppf)Ru} 2(C?C-R-C?C)](PF6) [R = 0, 1a(PF6); 1,4-naphthalenediyl, 3a(PF6); 9,10-anthracenediyl, 4a(PF 6)] with Ru2II,III mixed valence. Electrochemical and visible-infrared spectral studies revealed that the electronic delocalization depends on the R substituent in the bridging ligand C?C-R-C?C. While the mixed-valence compound 1a(PF6) (R = 0) displays an electronically delocalized behavior (class III mixed-valence system), 3a(PF6) (R = 1,4-naphthalenediyl) and 4a(PF6) (R = 9,10-anthracenediyl) may belong to borderline compounds between electronic localization and delocalization.
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate