Darstellung und Eigenschaften Heterobimetallischer Komplexe — Kristallstruktur von [(acac)3ZrOCCo3(CO)9]

‘Early–late’ bimetallic complexes of the type [(acac)3M–OCCo3(CO)9] (M=Zr (1), Hf (2)) are formed in reactions between (acac)3MCl and NaCo(CO)4. These complexes exhibit a remarkable stability. They were characterized by their IR, 1H- and 13C-NMR spectra. The crystal structure of 1 was determined.