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Abstract <p>The crystal chemical analysis of compounds whose structure contains coordination polyhedra <i>M</i>[C<sub><i>n</i></sub><i>M</i><sub><i>m</i></sub>] where <i>M</i>&#xa0;=&#xa0;Ga, In, Tl is carried out by intersecting sectors and Voronoi–Dirichlet polyhedra (VDP). Coordination numbers of Ga, In, and Tl atoms in the carbon environment are found to be 1–5; 1–3; 1 and 5 respectively. It is shown that apart from <i>M</i>–C chemical bonds, in the structures of metal-organic compounds, these atoms can form 1–5 <i>M</i>–<i>M</i> (<i>M</i>&#xa0;=&#xa0;Ga, In, Tl) bonds in the case of gallium and 1 or 3 for indium and thallium derivatives. The presence is detected of a uniform liner dependence of solid angles of VDP faces corresponding to the formation of valence and non-valence <i>M</i>–C interactions on the respective internuclear distances. Possible agostic <i>M</i>⋯H–C (<i>M</i>&#xa0;=&#xa0;Ga, In, Tl) interactions are analysized.</p>

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Coordination Polyhedra M[CnMm] (M = Ga, In, Tl) in Crystal Structures

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • M. O. Karasev,
  • D. V. Pushkin

摘要

Abstract

The crystal chemical analysis of compounds whose structure contains coordination polyhedra M[CnMm] where M = Ga, In, Tl is carried out by intersecting sectors and Voronoi–Dirichlet polyhedra (VDP). Coordination numbers of Ga, In, and Tl atoms in the carbon environment are found to be 1–5; 1–3; 1 and 5 respectively. It is shown that apart from M–C chemical bonds, in the structures of metal-organic compounds, these atoms can form 1–5 M–M (M = Ga, In, Tl) bonds in the case of gallium and 1 or 3 for indium and thallium derivatives. The presence is detected of a uniform liner dependence of solid angles of VDP faces corresponding to the formation of valence and non-valence M–C interactions on the respective internuclear distances. Possible agostic M⋯H–C (M = Ga, In, Tl) interactions are analysized.