OCTAKIS(TETRACARBONYLCOBALTIO)OCTASILSESQUIOXANE - SYNTHESIS, STRUCTURE, AND REACTIVITY

The reaction of octacarbonyldicobalt with octahydridosilsesquioxane (4 :1 stoichiometry) in he.vane leads to octakis(tetracarbonylcobaltio)oc tasilsesquioxane (1), the first octasilsesquioxane in which eight meta ls are directly bound to the silicon atoms of the siloxane cage. The p roduct has been characterized by Si-29 CP-MAS NMR, IR, and Raman. spec troscopy as well as elemental analysis and MALDI TOF spectrometry. The molecular structure of 1 has been determined by single-crystal X-ray diffraction. In combination with triphenylphosphine, I shows catalytic activity in the hydroformylation of 1-hexene.