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Abstract <p>Based on a series of substituted <i>o</i>-iminobenzoquinones (6-((2,6-di-<i>iso</i>-propylphenyl)imino)-2,4-bis(2,4,4-trimethylpentan-2-yl)cyclohexa-2,4-dien-1-one (L<sup>1</sup>), 4-(<i>tert</i>-butyl)-6-((2,6-di-<i>iso</i>-propylphenyl)imino)-3-methoxycyclohexa-2,4-dien-1-one (L<sup>2</sup>), and 6-((2,6-di-<i>iso</i>-propylphenyl)imino)-3-methoxy-4-(2,4,4-trimethylpentan-2-yl)cyclohexa-2,4-dien-1-one (L<sup>3</sup>)), indium(III) iodide complexes were synthesized containing a redox-active ligand in the neutral form. The <i>o</i>-iminobenzoquinone L<sup>1</sup> was synthesized for the first time. It was found that the structure of the obtained complexes depends on the degree of shielding of the carbonyl oxygen atom in the starting <i>o</i>-iminobenzoquinone. The sterically hindered L<sup>1</sup> forms a 1 : 1 adduct with InI<sub>3</sub> (complex (L<sup>1</sup>)InI<sub>3</sub> (<b>I</b>)). The absence of a substituent at position 2 of the <i>o</i>-iminobenzoquinone ring promotes the formation of bisligand ionic derivatives {[(L<sup>2</sup>)<sub>2</sub>InI<sub>2</sub>]InI<sub>4</sub>} (<b>II</b>) and {[(L<sup>3</sup>)<sub>2</sub>InI<sub>2</sub>]InI<sub>4</sub>} (<b>III</b>). The molecular structure of L<sup>1</sup> and complexes <b>I</b>·0.5 toluene, <b>II</b>·toluene·0.5 hexane was established by X-ray diffraction analysis (CCDC nos. 2440874 (L<sup>1</sup>), 2440875 (<b>I</b>·0.5 toluene), 2440876 (<b>II</b>·toluene·0.5 hexane)). The optical and electrochemical properties of the starting <i>o</i>-iminobenzoquinones and their indium(III) complexes were studied. It was shown that complexation significantly enhances the oxidative properties of L<sup>1</sup>, L<sup>2</sup>, and L<sup>3</sup>.</p>

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Influence of the Steric Factor on the Structure of Indium(III) Iodide Complexes Based on Substituted o-Iminobenzoquinones

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • I. N. Meshcheryakova,
  • N. O. Druzhkov,
  • T. N. Kocherova,
  • R. V. Rumyantcev,
  • M. V. Arsenyev,
  • N. M. Khamaletdinova,
  • A. V. Piskunov

摘要

Abstract

Based on a series of substituted o-iminobenzoquinones (6-((2,6-di-iso-propylphenyl)imino)-2,4-bis(2,4,4-trimethylpentan-2-yl)cyclohexa-2,4-dien-1-one (L1), 4-(tert-butyl)-6-((2,6-di-iso-propylphenyl)imino)-3-methoxycyclohexa-2,4-dien-1-one (L2), and 6-((2,6-di-iso-propylphenyl)imino)-3-methoxy-4-(2,4,4-trimethylpentan-2-yl)cyclohexa-2,4-dien-1-one (L3)), indium(III) iodide complexes were synthesized containing a redox-active ligand in the neutral form. The o-iminobenzoquinone L1 was synthesized for the first time. It was found that the structure of the obtained complexes depends on the degree of shielding of the carbonyl oxygen atom in the starting o-iminobenzoquinone. The sterically hindered L1 forms a 1 : 1 adduct with InI3 (complex (L1)InI3 (I)). The absence of a substituent at position 2 of the o-iminobenzoquinone ring promotes the formation of bisligand ionic derivatives {[(L2)2InI2]InI4} (II) and {[(L3)2InI2]InI4} (III). The molecular structure of L1 and complexes I·0.5 toluene, II·toluene·0.5 hexane was established by X-ray diffraction analysis (CCDC nos. 2440874 (L1), 2440875 (I·0.5 toluene), 2440876 (II·toluene·0.5 hexane)). The optical and electrochemical properties of the starting o-iminobenzoquinones and their indium(III) complexes were studied. It was shown that complexation significantly enhances the oxidative properties of L1, L2, and L3.