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Abstract <p>Mononuclear coordination compounds [Cu(L<sup>1</sup>)<sub>2</sub>(H<sub>2</sub>O)] (<b>1</b>) and [Zn(L<sup>2</sup>)<sub>2</sub>]·1.41H<sub>2</sub>O (<b>2</b>) are synthesized by reacting copper(II) or zinc(II) salts with 5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1<i>H</i>-pyrazole-3-carbohydrazide (<b>L</b>). During the synthesis of complex <b>1</b>, hydrolysis occurs of the C(O)–NH hydrazide bond in initial <b>L</b> with the formation of 5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1<i>H</i>-pyrazole-3-carboxylic acid (<b>HL</b><sup><b>1</b></sup>), with its anions (<b>L</b><sup><b>1</b></sup>)<sup><b>–</b></sup> being a part of the complex. The formation of <b>2</b> is accompanied by acylation of <b>L</b>, therefore, <i>N</i>′-acetyl-5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1<i>H</i>-pyrazole-3-carbohydrazide is present in the deprotonated form (<b>L</b><sup><b>2</b></sup>)<sup><b>–</b></sup> as ligands in the structure of the complex. The structures of the synthesized compounds are established by the single crystal X-ray diffraction analysis.</p>

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Synthesis and Structure of Cu(II) and Zn(II) Coordination Compounds with Tetrafluorophenyl-Substituted Pyrazole Ligands

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • E. N. Zorina-Tikhonova,
  • A. E. Vladimirova,
  • A. M. Vampilova,
  • V. A. Novikova,
  • K. R. Zhirnova,
  • A. K. Matiukhina,
  • A. I. Ivantsov,
  • I. V. Skabitsky,
  • S. S. Shapovalov,
  • I. L. Eremenko

摘要

Abstract

Mononuclear coordination compounds [Cu(L1)2(H2O)] (1) and [Zn(L2)2]·1.41H2O (2) are synthesized by reacting copper(II) or zinc(II) salts with 5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1H-pyrazole-3-carbohydrazide (L). During the synthesis of complex 1, hydrolysis occurs of the C(O)–NH hydrazide bond in initial L with the formation of 5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1H-pyrazole-3-carboxylic acid (HL1), with its anions (L1)– being a part of the complex. The formation of 2 is accompanied by acylation of L, therefore, N′-acetyl-5-methyl-1-(2,3,5,6-tetrafluorophenyl)-1H-pyrazole-3-carbohydrazide is present in the deprotonated form (L2)– as ligands in the structure of the complex. The structures of the synthesized compounds are established by the single crystal X-ray diffraction analysis.