摘要:
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.