TEMPLATE SYNTHESIS AND CHARACTERIZATION OF RHODIUM(III), IRIDIUM(III)AND PLATINUM(II) TETRAAZAMACROCYCLIC COMPLEXES

A series of 14-16-membered tetraazamacrocyclic complexes have been pre pared by the condensation reactions of 1,2-diaminoethane, 1,3-diaminop ropane or ortho-phenylenediamine with dibenzoylmethane in the presence of rhodium(III), iridium(III) and platinum(II) ions as templates. Str uctures and bonding of the macrocyclic complexes have been proposed ba sed on elemental analyses, IR, H-1 NMRI electronic spectral studies an d conductivity, as well as magnetic susceptibility measurements. The s tereochemistry around rhodium and iridium ions is proposed to be octah edral, while a square planar geometry is proposed for the platinum com plexes.