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GeClx[Co(CO)3PR3]4-x (x = 0-3; R = nPr, nBu): from cobalt substituted germanes to novel binary cluster compounds
Lars Preißing1, Elias Behling1, Andreas Schnepf1
1Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany. andreas.schnepf@uni-tuebingen.de.
Abstract:
The synthesis of a variety of cobalt substituted germanes of the composition GeClx[Co(CO)3PR3]4-x (x = 0-3; R = nPr, nBu) is presented, which can be obtained in average to good yields from a reaction of GeCl2·dioxane and Co2(CO)8 or KCo(CO)4 in the presence of the respective phosphine. Reductive coupling reactions with potassium/benzophenone lead to ligand scrambling while the reductive coupling with Mg/MgBr2 leads to the pseudo-cubic cluster compound Ge7Co(CO)3[Co(CO)3PnBu3]72, showing that the mixed substituted germanes are powerful precursors to this new class of cluster compounds. All compounds are structurally characterized and well observable via NMR and IR spectroscopy.
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