COBALT COMPLEXES CONTAINING B7C2H92-LIGAND . A METALLOCENE ANALOG

1,3-Dicarba-nido-nonaborane(13), 1,3-B7C2H13, reacts with 2 moles of sodium hydride to give 1,3-dicar-ba-nido-undecahydrononaborate(2—), 1,3-B7C2H112-. The 1,3-B7C2H112- dianion and anhydrous cobalt(II) chloride react to give “dicarbazapide” ion, B7C2H92-, complexes of formal cobalt(III). Depending upon reaction conditions, the complexed dicarbazapide ion ligand appears in either a 1,6- or 6,7-isomeric form. A thermal polyhedral rearrangement of these isomers, involving carbon atom migration, to give a 1,10 isomer is described. The preparation, characterization, and structures of these complexes are discussed. © 1969, American Chemical Society. All rights reserved.