Novel N₄ Macrocycles and Their Transition Metal Chelates

Abstract

Four novel N 4 -type macrocyclic chelating agents L 1 , L 2 , L 3 , L 4 with pendant groups and their metal chelates with some transition metal ions have been synthesized. Electrical conductance of the Cr(III) and Fe(III) chelates indicated them to be 1:1 electrolytes whilst those of divalent metal ions are non-electrolytes in DMSO. Spectroscopic evidence suggests that all of the complexes are six-coordinate and the pendant groups are not involved in coordination.