Complexation of dirhodium(II) with N-functionalized calix[4]resorcinarenes

Resumo

Some features of the complexation of [Rh₂(OAc)₄•2H₂O] with calix[4]resorcinarenes functionalized by aminoalkyl groups in the upper or lower rims in EtOH and Me₂CO are considered. The properties of complexes were studied by IR, UV—Vis, Raman, ESR, ¹H NMR spectroscopies, simultaneous thermal analysis, and conductommetry. It is shown that the way of coordination of calixresorcinarene matrix to the central atom, either through the donor nitrogen atoms of outer aminoalkyl groups or through oxygen atoms of resorcinarene groups, is determined by conformation and configuration capabilities of the ligands and the nature of the solvent.