Аннотация:1'-Phthalazinylhydrazone of acetylferrocene (HL) and copper(II) and nickel(II) complexes on its basis [CuL2] and [NiL2] have been synthesized and investigated. The structure of the hydrazine was determined by X-ray diffraction analysis. Quantum-chemical simulation of the tautomerism of the hydrazone was performed.