Koordinationschemie funktioneller Phosphorylide. VII. Pentacarbonylmetall-Komplexe des Cyanmethylen-triphenyl-phosphorans, [Ph3PCH(CN)] · M(CO)5 (M = Cr,Mo, W) |
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Authors: | U. Kunze,H. Jawad,W. Conzelmann,J. Str hle |
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Affiliation: | U. Kunze,H. Jawad,W. Conzelmann,J. Strähle |
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Abstract: | Coordination Chemistry of Functional Phosphorus Ylides. VII. Pentacarbonylmetal Complexes of Cyanomethylene Triphenylphosphorane, [Ph3P?CH(CN)] · M(CO)5 (M = Cr, Mo, W) The pentacarbonyl complexes [Ph3P?CH(CN)] · M(CO)5 ( 1a –c) are obtained by reaction of the irradiated metal hexacarbonyls M(CO)6 (M = Cr, Mo, W) with cyanomethylene triphenylphosphorane under exclusion of light. The IR and NMR spectra indicate N-coordination of the ligand, that means a nitrile complex. The chromium complex 1a crystallizes triclinic (space group P1 , Z = 2) with the lattice constant a = 1126.5(2), b = 1153.6(3), c = 951.4(3) pm; α = 103.47(3), β = 102.04(3), γ = 84.00(2)°. The linear array of the ligand atoms C7, C6, N forms an angle of 168.1(5)° with the metal-nitrogen bond. Significant bond distances are Cr? N = 206.2(6), N? C6 = 115.3(7), C6? C7 = 137.2(8) and P? C7 = 170.9(5) pm. |
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