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Abstract <p>The synthesis and crystal structure are described of new bimetallic platinum complex [Pt<sub>2</sub>Cl<sub>6</sub>(PPh<sub>3</sub>)<sub>2</sub>] (<b>1</b>) obtained by partial reduction of hexachloroplatinic acid H<sub>2</sub>[PtCl<sub>6</sub>] in the presence of triphenylphosphine and sodium hydrocarbonate in tetrahydrofuran. The complex is isolated as an intermediate reaction product. It is found that the crystal structure of complex <b>1 </b>contains two platinum atoms in different coordination environments: Pt1 has the square planar geometry and Pt2 is a distorted tetragonal bipyramid. It is indicative of the presence of platinum in mixed oxidation states (II/IV). The molecules are packed mainly by C–H⋯Cl interactions in the crystal, as confirmed by the analysis of Hirshfeld surfaces and 2D fingerprints. The data obtained expand our knowledge about the intermediate products of H<sub>2</sub>[PtCl<sub>6</sub>] reduction and can be useful for understanding the mechanisms of homogeneous catalysis based on platinum complexes, particularly in hydrosilylation and silicone vulcanization reactions.</p>

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Synthesis, Molecular and Crystal Structures of the [Pt2Cl6(PPh3)2] Complex

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • E. E. Levina,
  • I. F. Sakhapov,
  • Z. N. Gafurov,
  • A. A. Zagidullin,
  • L. V. Frantsuzova,
  • D. G. Yakhvarov

摘要

Abstract

The synthesis and crystal structure are described of new bimetallic platinum complex [Pt2Cl6(PPh3)2] (1) obtained by partial reduction of hexachloroplatinic acid H2[PtCl6] in the presence of triphenylphosphine and sodium hydrocarbonate in tetrahydrofuran. The complex is isolated as an intermediate reaction product. It is found that the crystal structure of complex 1 contains two platinum atoms in different coordination environments: Pt1 has the square planar geometry and Pt2 is a distorted tetragonal bipyramid. It is indicative of the presence of platinum in mixed oxidation states (II/IV). The molecules are packed mainly by C–H⋯Cl interactions in the crystal, as confirmed by the analysis of Hirshfeld surfaces and 2D fingerprints. The data obtained expand our knowledge about the intermediate products of H2[PtCl6] reduction and can be useful for understanding the mechanisms of homogeneous catalysis based on platinum complexes, particularly in hydrosilylation and silicone vulcanization reactions.