Research of nickel(II) complexes with aroyl hydrazones of 5,5-dimethyl-2,4-dioxogexane acid ethyl ester ergashov Mansur Yarashovich

CONCLUSIONS

As a result of studies using IR and ¹H-NMR spectroscopy, it has been found that in the process of complexation, regardless of the geometric structure of the initial ligands, the 5-hydroxypyrazoline ring is open. It was shown by X-ray diffraction analysis that the doubly deprotonated residue of the ligand H₂L₄ (1-benzoyl-3-aryl-5-hydroxy-2-pyrazoline) in the linear form of enhydrazine-oxyazine is tridentately coordinated to the central ion, forming five- and six-membered metallocycles [NiN₂,O₂ ], the fourth place of which is occupied by the ammonia molecule. NiC₃₂H₃₄N₆O₆ single crystals were grown by recrystallization of NiL⁶∙NH₃ molecules based on Н₂L⁶ in pyridine medium.
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