Treatment of dibromo (pentamethylcyclopentadienyl) osmium (III) dimer with alkali metal salts of a variety of cyclopentadienyl derivatives provides a simple approach to the synthesis of unsymmetrical osmocenes containing the pentamethylcyclopentadienyl ligand. Furthermore, the reaction of dibromo (pentamethylcyclopentadienyl) osmium (III) with alkali metal salts of pyrrole and 3, 5-di-tert-butylpyrazole afforded the corresponding ...
