摘要:
The chelating behaviour of neutral and deprotonated 2,6-diacetylpyridine-mono(carbohydrazone) (Hdapc) has been studied in some new complexes of Pd(II), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Ba(II) and UO2(VI). Spectroscopic, magnetic susceptibility and other analytical studies reveal that the ligand behaves as an NN-chelating agent in the neutral form and as an ONNO- or NNO-chelating agent in the deprotonated form. Molar conductance measurements indicate the presence of coordinated chloride ion and acetate group. The geometry of some of the metal complexes is also discussed. In addition, the thermal behaviour and the nature of the interaction of the water of crystallisation of some of the metal complexes have been studied using DTA, TG, X-ray powder diffraction, IR and solid electrical conductivity techniques.