Kristall- und molekülstruktur vonzwei metallcarbonyl-derivaten des PH3: (CO)3Cr(PH3)3 und (CO)5Cr(PH3) |
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Authors: | Gottfried Huttner Siegfried Schelle |
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Institution: | Anorganisch Chemisches Laboratorium der Technischen Universität, 8000 München 2, Arcisstr. 21 Deutschland |
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Abstract: | The structures of two carbonylphosphine complexes of chromium were determined by X-ray analysis. cis-Tricarbonyltriphosphinechromium(0), (CO)3(PH3)3Cr], crystallizes in space group P21/m with a = 6.90± 0.01, b = 11.29±0.02, c = 6.41±0.01 Å, β = 93.80±0.08°, Z=2. The structure was solved by conventional methods and refined by least squares (R1 = 0.056). The idealized octahedral molecule shows approximate C3v, symmetry. The mean CrP-distance is 2.346±40.003 Å. Pentacarbonylphosphinechromium, (CO)5(PH3)Cr], crystallizes in spacegroup Pnma with a = 12.23±0.02, b = 11.33±0.02, c = 6.61 ±0.01 Å, Z = 4. Cell dimensions and structural parameters are very similar to those of hexacarbonylchromium(0). In the crystal the PH3 group is disordered over three mutually cis-positions of the coordination octahedron. |
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