Scholarlink

Abstract <p>The complexation reactions of cadmium(II) and lead(II) nitrates with azaheterocyclic acids quinaldine-2-carboxylic HQln, quinoxaline-2-carboxylic HQox, and xanthurenic HXan in organic solvents (CH<sub>3</sub>CN, DMF, DMSO) were studied. It was found that the reactions in acetonitrile proceed with the formation of heterocyclic complex compounds [M(Qln)NO<sub>3</sub>] or [M(Qox)NO<sub>3</sub>] (M = Cd, Pb) with azaheterocarboxylate and nitrate anions as ligands. The presence of other solvents (DMF, H<sub>2</sub>O) leads to the formation of compounds with the corresponding coordinated solvent molecules. Carrying out the lead(II) complexation reaction when heating leads to the formation of complex [Pb(Qln)<sub>2</sub>]. It was found that reactions with xanthurenic acid HXan in DMSO resulted in the formation of associate HXan·DMSO as the main product. The structures of complexes [Cd(Qox)(H<sub>2</sub>O)<sub>2</sub>(NO<sub>3</sub>)]·H<sub>2</sub>O and [Pb<sub>3</sub>(Qox)<sub>4</sub>(NO<sub>3</sub>)<sub>2</sub>]·2DMF, as well as the molecular associate HXan·DMSO, were determined using X-ray diffraction. In the complexes, quinaldine-2-carboxylate acts as a bidentate N,O-ligand, and quinoxaline-2-carboxylate acts as a tridentate N,O,O-ligand.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and Structures of Cadmium(II) and Lead(II) Complexes with Azaheterocarboxylate Ligands

  • 期刊论文

  • 发表日期：

    2026年7月29日

查看全文
  • T. A. Tikhonova,
  • V. V. Avdeeva,
  • A. S. Kubasov,
  • L. V. Goeva,
  • N. T. Kuznetsov

摘要

Abstract

The complexation reactions of cadmium(II) and lead(II) nitrates with azaheterocyclic acids quinaldine-2-carboxylic HQln, quinoxaline-2-carboxylic HQox, and xanthurenic HXan in organic solvents (CH3CN, DMF, DMSO) were studied. It was found that the reactions in acetonitrile proceed with the formation of heterocyclic complex compounds [M(Qln)NO3] or [M(Qox)NO3] (M = Cd, Pb) with azaheterocarboxylate and nitrate anions as ligands. The presence of other solvents (DMF, H2O) leads to the formation of compounds with the corresponding coordinated solvent molecules. Carrying out the lead(II) complexation reaction when heating leads to the formation of complex [Pb(Qln)2]. It was found that reactions with xanthurenic acid HXan in DMSO resulted in the formation of associate HXan·DMSO as the main product. The structures of complexes [Cd(Qox)(H2O)2(NO3)]·H2O and [Pb3(Qox)4(NO3)2]·2DMF, as well as the molecular associate HXan·DMSO, were determined using X-ray diffraction. In the complexes, quinaldine-2-carboxylate acts as a bidentate N,O-ligand, and quinoxaline-2-carboxylate acts as a tridentate N,O,O-ligand.