Synthesis, specteral characterization, structure, and application oftridentate ONO hydrazone Schiff base metal complexes

An imine or Schiff base is a chemical compound in which the C=O has been changed to aC=N [۱]. Schiff base works like a ligand and may coordinate with the metals by its iminicnitrogen and another donating moiety, generally OH [۲]. Numerous Schiff bases prepared fromdiverse amines have been studied utilizing various techniques, and it has been demonstrated thatthese compounds have promising uses in materials chemistry, agriculture, and industry [۳].Schiff bases can also serve as catalysts in a variety of organic procedures as well as in theinvention of biologically active substances, plant growth regulators, and organic dyes [۴].Hydrazones, a particular group of species in the family of Schiff bases, are recognized by theexistence of R۱C=N-NR۲ group. The existence of two interconnected N atoms sets them apartfrom the rest of the members of this family (oximes and imines). The nitrogen atoms arenucleophilic, whereas the carbon atoms have electrophilic property. When hydrazones arecombined with a variety of functional groups, new compounds with distinctive biologicalcharacteristics are created. We hope to offer a fresh perspective on this class of compounds byhighlighting the significance of various types of tridentate ONO Schiff base ligands and theircomplexes, whose single crystals were reported in the recently years through the reactions ofsalicylaldehyde and its derivatives with various acylhydrazides such as nicotinohydrazide andisoniazid. This kind of Schiff bases exhibit amide-iminol tautomerism, in which the carbonnitrogendouble bond is a component of the iminol tautomer. The molecular structure, spectralcharacterization, and applications of ONO Schiff base complexes are covered in this paper.

کلیدواژه ها:

Tridentate ، ONO Hydrazone ، Schiff base ، Metal complex