Bamigboye, Mercy OEke, U BObaleye, Joshua ABabamale, Halimah Funmilayo2023-08-242023-08-242017https://uilspace.unilorin.edu.ng/handle/20.500.12484/11675The formation of Isonicotinic Acid Hydrazide and Pyrazine-2-carboxamide complexes were prepared and analyzed by determining the stoichiometry and stability constant (Spectrophotometric method). The ionic strength used was maintained constant at 0.1 M KNO3. The stability constants were calculated to be log 61.21 - 254 in Isonicotinic Acid Hydrazide while in Pyrazine-2-carboxamide 55.5 - 274.29. The order of stability constant of the metal to ligand reaction follows this trend: Ni(II) > Cu(II) > Co(II) > Fe(II) > Mn(II) > Zn(II). The order of the stability constant is in agreement with the trend of Electronegativity.enIsonicotinic Acid HydrazidePyrazine-2-carboxamideComplexesIonic strengthStability constantArticle