Template Synthesis and Characterization of Rhodium(III), Iridium-(III) and Platinum(II) Tetraazamacrocyclic Complexes

Abstract

A series of 14–16-membered tetraazamacrocyclic complexes have been prepared by the condensation reactions of 1, 2-diamino-ethane, 1, 3-diaminopropane or ortho-phenylenediamine with dibenzoylmethane in the presence of rhodium(III), iridium(III) and platinum(II) ions as templates. Structures and bonding of the macrocyclic complexes have been proposed based on elemental analyses, IR, ¹H NMR, electronic spectral studies and conductivity, as well as magnetic susceptibility measurements. The stereochemistry around rhodium and iridium ions is proposed to be octahedral, while a square planar geometry is proposed for the platinum complexes.