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- W2029123563 abstract "[Bis(diphenylphosphino)ethane]tricarbonyliron(0), Fe9(CO)3-(Ph2PCH2CH2-PPh2), has been prepared by reducing FeCl2 with metallic manganese under an atmosphere of CO in the presence of the diphosphine at room temperature in THF. The results of an X-ray diffraction study (room temperature, Mo-Kα) are: P21/n, a 12.260(6), b 15.890(7), c 14.227(6) Å, β 110.57(3)°, Z = 4, Dc 1.378, Dm 1.40 Mg m−3, Rf(2957413) = 0.0393. The iron is pentacoordinate, with a geometry intermediate between trigonal bipyramidal, with a phosphorus and a carbonyl apical, and square pyramidal with a carbonyl alpical. No significant differerences are observed between the FeP distances (av.2.224(2) Å) or between the FeCO distances (av. 1.770(5) Å). Comparison with the analogous bis(diphenylphosphino)methane derivative shows that the main differences in the coordination polyhedra arise from the difference in the P⋯P bite distance, which is 2.981(2) Å in the ethane derivative but only 2.650(3) Å in the methane derivative. The five-membered FePCCP chelate ring shows an unsymmetrical conformation, with one carbon atom tending to lie in the PFeP plane, the corresponding torsion about the FeP bond being almost zero (1.3(2)°). This kind of conformation is common for bis(diphenylphosphino)ethane chelating rings, suggesting a limited flexibility of that ring. The orientations of the phenyl groups are somewhat different from those in the corresponding bis(diphenylphosphino)methane complex." @default.
- W2029123563 created "2016-06-24" @default.
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- W2029123563 date "1987-08-01" @default.
- W2029123563 modified "2023-09-23" @default.
- W2029123563 title "The crystal and molecular structure of [bis(diphenylphosphino)ethane]tricarbonyliron(0)" @default.
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- W2029123563 doi "https://doi.org/10.1016/0022-328x(87)80281-4" @default.
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