Ge4Cl4[MCp(CO)3]4 (M = Cr,Mo, W): A Series of Transition Metal Substituted Four-membered Cyclogermanes |
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Authors: | Lars Preißing Claudio Schrenk Andreas Schnepf |
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Affiliation: | Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany |
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Abstract: | The reaction of GeCl2 · dioxane with the sodium salts NaMCp(CO)3 (M = Cr, Mo, W) leads to new four-membered ring compounds Ge4Cl4[MCp(CO)3]4, where the remaining chlorine atom cannot be substituted by another MCp(CO)3 substituent. A large excess of the sodium salts only leads to some minor side-reactions. All Ge4-compounds exhibit a non-planar four-membered Ge4 ring, which can be traced back to electrostatic effects as shown by quantum chemical calculations. Furthermore, cluster build-up reactions might be possible due to the halide substituents in the new ring compounds of germanium, showing that GeCl2 · dioxane is an excellent starting material for the synthesis of cluster compounds of germanium. |
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Keywords: | Quantum chemical calculations Germanium Ring compounds X-ray diffraction |
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