Synthesis and Characterization of Mono‐ and Trinuclear Complexes of BF 2 + Bridged Macrocycles

Dibenzo[e,k]‐2,3‐bis(hydroxyimino)‐1,4‐dithia‐7,10‐diaza‐2,3,8,9‐tetrahydrocyclododecine (H 2 L) has been prepared from 1,2‐bis(o‐mercaptoanilino) ethane ( 4 ) and (E,E)‐dichloroglyoxime. A mononuclear complex with a metal: ligand ratio of 1:2 has been isolated for cobalt(III). The Co III complex of H 2 L has been prepared with L′ = 2,6‐lutidine, and with a chlorine ion as axial ligands. In addition to that, the synthesis of a new cobalt complex which contains BF 2 + bridges is achieved with the bis(E,E)‐dioxime ligand. The trinuclear complex of this Co III complex has been obtained by the reaction of BF 2 + bridged Co III complex with Pd[bis(benzonitrile)]Cl 2 . The structures of these complexes and (E,E)‐dioxime were identified by using elemental analysis, 1 H and 13 C‐NMR, IR and MS spectral data.