Abstract
Five novel metal coordination compounds with (Z)-4-(2-hydroxy-5-nitrophenyl)hydrazono-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (H2L) have been prepared and isolated in crystalline state. Crystal and molecular structure of H2L have been established by X-ray diffraction study. A molecule of the organic compound exists in crystal state as a nearly flat hydrazo tautomer stabilized by intramolecular hydrogen bonds. Metal coordination is tridentate chelate, which has been confirmed by IR, electronic, 1H NMR, and EPR spectroscopy and DFT/B3LYP quantum chemical modeling. Coloristic and fungicidal properties of H2L and its metal complexes have been studied.
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