Synthesis and Characterization of a Cobalt(II) Complex with (E)-N-(2-Hydroxy-3-Methoxybenzylidene) Isonicotinohydrazide and (E)-N-(2-Hydroxy-3-Methoxybenzylidene) Isonicotinohydrazidanium Nitrate as a By-Product

摘要

A Schiff base ligand was synthesized from the reaction of isonicotinic acid hydrazide with 3-methoxysalicylaldehyde. The reaction of LH with Co(NO3)(2.6)H2O in methanol gave dark red crystals of [Co(HL)(2)](NO3)(2.3)H2O and colorless crystals of the protonated ligand (HLH) C with nitrate as the counter ion, (HLH)(NO3). In coordination to metal, Schiff base ligand was protonated via hetrocyclic nitrogen atom of the pyridine ring and deprotonated on the phenolic OH group, two ligands behave as neutral tridentate ligands. The extensive O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonding interactions in the solid state contribute to the formation of an infinite one-dimensional chain in the complex.