Template synthesis of a hetero-ditopic cryptand with three naphthyl side groups: synthesis and characterisation of Cu(II) and Ni(II) cryptates

Abstract

A new hetero-ditopic cryptand with naphthyl side groups has been synthesized by tripod-tripod Schiff base condensation of a tripodal trialdehyde with tris(2-aminoethyl)amine in presence of Cs(I) ion. This cryptand reacts readily with Cu(II) and Ni(II) salts forming mononuclear cryptates. The Cu(II)-cryptate can accept a molecule of H₂S which is tightly bound to the metal ion forming a CuN₄S complex. The electronic spectral characteristics are indicative of the presence of Cu-SH₂ bond.