New Complexes Of Vanadium And Tungsten With 4-Aminoantipyrine Derivative Synthesis And Spectral Properties

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A new vanadium and tungsten monometallic complexes were prepared, these complexes containing 4-aminoantipyirne derivative namely1,5-dimethyl-2-phenyl-4-3-phenylallylidene)amino)-1H-pyrazol-3(2H)-one as ligand. The ultraviolate and infrared were employed to characterized new complex. The optimum pH for complex has been investigated. The V(Ⅴ ) and W(Ⅵ ) complexes are detected at λ max = 375 nm and pH = 6 , bear-Lambert’s law is was in the range =(0.3×10--5– 55×10-5 M ) for V complex, while at λ max = 385 nm and pH = 7 and concentration range =(0.3×10--5– 58×10-5 M ) for W complex. Different spectrophotometric methods was used to determine the stoichiometry of complexes and the molar conductivity.