METALLOBORANES .2. TRANSITION METAL COMPLEXES OF B10H122-

Initial studies suggest a substantial scope and chemistry for metalloboranes based on the B10H122− ligand and transition metal ions. Three types of complexes have been established: (A) M(B10H12)22− with M representing cobalt, nickel, palladium, and platinum; (B) M(B10H12)L2 for palladium or platinum with L representing triorganophosphines; (C) M(B10H12)L3− for cobalt, rhodium, and iridium with carbon monoxide and phosphine ligands. It is proposed that the B10H122− moiety interacts with the transition metal atom primarily as a bidentate ligand to form an 11-atom icosahedral fragment. The two extra hydrogen atoms bridge edges of the open pentagonal face of the icosahedral fragment. Spectral and diffraction data fully support this ligand-metal interaction for all three types of complexes. © 1968, American Chemical Society. All rights reserved.