Metal coordination architectures of N-propionyl-1-hydroxy-2-naphthoylhydrazide: From metalladiazamacrocycles to trinuclear complexes

Abstract

Two metalladiazamacrocycles, 24-membered octanuclear [Mn 8(pnhz) 8(DMF) 5(MeOH) 3]2DMF 3.5MeOH ( 1) and 18 ‐membered hexanuclear [Fe 6(pnhz) 6(DMF) 6] ( 2), and two linear trinuclear complexes, [Cu 3(pnhz) 2(Py) 6] 2Py ( 3) and [Ni 3(pnhz) 2(Py) 4] ( 4), have been synthesized based on a trianionic pentadentate bridging ligand N-propionyl-1-hydroxy-2-naphthoylhydrazide (H 3pnhz). The complexes are characterized by elemental analysis, IR, UV–vis spectroscopy and single-crystal X-ray diffraction. The nature of metal ions and steric effect of N-propionyl-1-hydroxy-2-naphthoylhydrazide ligand play key roles in the formation of complexes with different nuclearity. Complexes 1, 2 and 3 exhibit antiferromagnetic coupling interactions between the metal centers.