Carbonyl-isocyanide mono-substitution in [Fe2Cp2(CO)4]: A re-visitation
نویسندگان
چکیده
Abstract The reactions of [Fe2Cp2(CO)4] with a series isocyanides, CNR, were conducted in acetonitrile and afforded, after thermal treatment, the mono-isocyanide derivatives [Fe2Cp2(CO)3(CNR)] [R = 1H-indol-5-yl, 1; CH2P(O)(OEt)2, 2; Cy = C6H11, 3; 4-C6H4OMe, 4; Xyl = 2,6-C6H3Me2, 5; Me, 6; 2-naphthyl, 7; Bn = CH2Ph, 8]. In order to avoid multiple substitution, diiron reactant was used molar excess respect isocyanide (1.6 equivalents; 1.1 for synthesis 8). products separated from unreacted by chromatography or via reversible protonation, finally isolated 50–83% yields. IR NMR spectroscopy indicate that ligand is bridging coordinated 2 7, terminal 3 5, while remaining cases mixture terminal- bridging-CNR isomers obtained. molecular structure 5 ascertained X-ray diffraction. general, coordination mode scarcely influenced environment (solvents different polarities, solid state). Sluggish partial migration position recognized upon heating refluxing toluene, process which reproduced DFT calculations.
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ژورنال
عنوان ژورنال: Inorganica Chimica Acta
سال: 2021
ISSN: ['1873-3255', '0020-1693']
DOI: https://doi.org/10.1016/j.ica.2020.120181