C<scp>RYPTATES</scp> XIX. Ligands polyaza‐polyoxa‐macrobicycliques: Synthèse et complexes métalliques

Abstract

Polyaza‐polyoxa macrobicyclic ligands: its synthesis and metal complexes. The synthesis of the polyaza‐polyoxa macrobicyclic ligands 1–4 is described. They form complexes with a variety of metal cations, transition metal cations as well as alkali and alkaline‐earth cations. These complexes may be formulated as cation inclusion complexes, cryptates , in which the cation is contained in the intramolecular cavity. The properties of the complexes are described. An especially interesting feature is that these ligands, polymines of macrobicyclic topology, provide a means of trapping transition metal cations inside a molecular cavity; thus they impose coordination geometries and may modify the spectral and redox properties of the cations.