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Abstract <p>New bimetallic complexes of the composition [MHg(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>(SCN)<sub>4</sub>] have been synthesized, where M = Mn<sup>2+</sup> (<b>I</b>), Fe<sup>2+</sup> (<b>II</b>), Cd<sup>2+</sup> (<b>III</b>) and C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O is nicotinamide (NA). The compounds were obtained from aqueous solutions and studied by CHNS/O analysis, IR spectroscopy, inductively coupled plasma optical emission spectrometry (ICP-OES), and single-crystal X-ray diffraction. Compounds <b>I</b>–<b>III</b> are isostructural and crystallize in the monoclinic syngony (space group <i>C</i>2/<i>c</i>). The coordination environment of the M<sup>2+</sup> atom is formed by two donor nitrogen atoms of two monodentately coordinated NA and four nitrogen atoms of the SCN groups, which form bridges between the M<sup>2+</sup> and Hg<sup>2+</sup> ions, connecting them into a three-dimensional framework. Hg<sup>2+</sup> ions have a tetrahedral coordination environment consisting of four S atoms of four SCN groups.</p>

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Synthesis and Crystal Structures of Framework Tetrarhodanomercurate Mn(II), Fe(II), and Cd(II) Complexes with Nicotinamide

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • D. A. Barantsev,
  • N. V. Pervukhina,
  • N. V. Kuratieva,
  • T. G. Cherkasova

摘要

Abstract

New bimetallic complexes of the composition [MHg(C6H6N2O)2(SCN)4] have been synthesized, where M = Mn2+ (I), Fe2+ (II), Cd2+ (III) and C6H6N2O is nicotinamide (NA). The compounds were obtained from aqueous solutions and studied by CHNS/O analysis, IR spectroscopy, inductively coupled plasma optical emission spectrometry (ICP-OES), and single-crystal X-ray diffraction. Compounds I–III are isostructural and crystallize in the monoclinic syngony (space group C2/c). The coordination environment of the M2+ atom is formed by two donor nitrogen atoms of two monodentately coordinated NA and four nitrogen atoms of the SCN groups, which form bridges between the M2+ and Hg2+ ions, connecting them into a three-dimensional framework. Hg2+ ions have a tetrahedral coordination environment consisting of four S atoms of four SCN groups.