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Abstract <p>Heteroleptic mononuclear cobalt(III) complexes of the [L–Co<sup>III</sup>(<b>bipyr</b>)]<sup>+</sup> cation type are obtained for the first time by coordinating lower-rim 1,3-disubstituted calix[4]arene derivatives <b>2-3</b> (L) with coordinating salicylideneamine sites, 2,2′-bipyrimidine (<b>bipyr</b>), and cobalt(II) cations. Their structures are determined by single crystal X-ray diffraction. It is shown that regardless of the presence of an azophenyl substituent at the <i>para</i>-position of the coordinating fragment, a similar structural motif is observed that is featured by the cobalt(III) atom coordinated to two chelate N,O-coordinating centers of the macrocyclic ligand and two <b>bipyr</b> nitrogen atoms, forming a distorted octahedral <i>trans</i>-N<sub>4</sub>O<sub>2</sub> coordination sphere. For the complex based on <b>3</b>, containing azophenyl moieties, the 2D porous supramolecular architecture is obtained that is formed by numerous intermolecular CH/π- and π-stacking interactions.</p>

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Synthesis and Crystal Structure of New Heteroleptic Mononuclear Cobalt(III) Complexes Supported by 2,2'-Bipyrimidine and Lower-Rim 1,3-Disubstituted Calix[4]Arene Derivatives with Salicylideneamine Moieties

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Yu. V. Strelnikova,
  • A. A. Iova,
  • A. S. Ovsyannikov,
  • D. R. Islamov,
  • P. V. Dorovatovskii,
  • V. A. Burilov,
  • A. G. Kiyamov,
  • I. A. Litvinov,
  • S. E. Solovieva,
  • I. S. Antipin

摘要

Abstract

Heteroleptic mononuclear cobalt(III) complexes of the [L–CoIII(bipyr)]+ cation type are obtained for the first time by coordinating lower-rim 1,3-disubstituted calix[4]arene derivatives 2-3 (L) with coordinating salicylideneamine sites, 2,2′-bipyrimidine (bipyr), and cobalt(II) cations. Their structures are determined by single crystal X-ray diffraction. It is shown that regardless of the presence of an azophenyl substituent at the para-position of the coordinating fragment, a similar structural motif is observed that is featured by the cobalt(III) atom coordinated to two chelate N,O-coordinating centers of the macrocyclic ligand and two bipyr nitrogen atoms, forming a distorted octahedral trans-N4O2 coordination sphere. For the complex based on 3, containing azophenyl moieties, the 2D porous supramolecular architecture is obtained that is formed by numerous intermolecular CH/π- and π-stacking interactions.