Progress in the Preparation of Complex Cations of High Charge.

摘要

The purpose of this investigation was the synthesis of complex cations of high charge (+5 and up). Although only the +5 species was obtained, several compounds were prepared that may serve as building blocks in the formation of ions of much higher charge. The tetradentate ligand, 2,2'-bipyrimidine, reacts with cobalt(III) to give (Co(bipym)3)(+2) (bipym=2,2'-bipyrimidine). This species has six additional nitrogens on the outer surface that offer the possibility of coordination to other metal ions. Reaction of the hydrogen bromide salt of tetrakis(aminomethyl)methane (TAM) with CoCl2.6H2O and oxygen, or with Na3(Co(CO3)3) resulted in the formation of ((TAMH)2Co)Br5..