NOVEL SCHIFF-BASE COMPOUNDS CONTAINING CALIX[4]ARENE

New cyclic and acyclic Schiff bases have been prepared by condensation reaction of 5,17-diamino-25,26,27,28-tetrapropoxycalix [4] arene (L(B )) with 2,6-diformyl-4-chlorophenol and 1,5-diamino-3-aza(methyl)penta ne or with 2,3-dihydroxybenzaldehyde. The related complexes containing d- or f-metal ions have been obtained by reaction of the preformed li gands with the appropriate metal salt or by a template macrocyclic syn thesis. The hetero-polynuclear complexes have been synthesized by a st ep by step procedure. Condensation of 5,17-diformyl-25,27-dipropoxycal ix [4]arene (L(A)) with tris(2-aminoethyl) amine affords a macrobicycl ic ligand containing three calixarene units. The ligands and the relat ed complexes have been characterized by elemental analyses, IR or NMR spectroscopy and mass spectrometry. The stoicheiometries of the comple xes have been assigned by SEM and EDX investigations.