Synthesis and characterization of a new binuclear cobalt complex containing μ-acetamidino-μ-amido-μ-nitrito-bridged groups via an intramolecular condensation

Condensation of coordinated acetonitrile and one of the amine ligands in [(NH3)4Co·μ(NH2,NO2)·Co(NH3)4](CF3SO3)4. H2O (2c) results in the formation of a bridging acetamidino group. It is assumed that an intramolecular reaction occurred in which a coordinated amido ligand attack the substituted acetonitrile group to yield the third bridge. In this process the amido and acetonitrile groups which are coordinated to adjacent cobalt centers should bear a syn relationship. Synthesis and characterization of [(NH3)3Co·μ(CH3C(NH)2,NH2,NO2)·Co(NH3)3](CF3SO3)3 (5) is reported here.