Synthesis of macrotricyclic polyazacrptates on metal ions: X-ray crystal structures of [(3,11-dimethyl-7-nitro-1,5,9,13,16,19-hexa-azatricyclo[9.3.3.33,7]icosane)cobalt(III)](3+) and [(3,11-dimethyl-7,15-dinitro-1,5,9,13,18,21-hexa-azatricyclo[9.5.3.33,7]-docosane)cobalt(III)](3+) ions
Abstract
New macrotricyclic polyazacryptates with four-and six-membered chelate rings have been synthesized by the condensation of formaldeude and nitromethane or ammonia with the bis [1,1,1-tris(aminomethyl)ethane]-cobalt(III) ion, and the structures of two of the complexes have been determined by X-ray crystallography.