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ZnPCl7: a compositionally and structurally unprecedented metal-phospho-rus halide.

Hyeonjin Seo1, Seung-Tae Hong1,2

  • 1Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea.

Acta Crystallographica. Section E, Crystallographic Communications
|February 9, 2026
PubMed
Summary
This summary is machine-generated.

Researchers synthesized an unprecedented compound, zinc phosphorus hepta-chloride (ZnPCl7), revealing a novel crystal structure. This discovery expands the known compositional and structural diversity of mixed-metal halides.

Keywords:
crystal structuremoisture sensitivephospho­rus(V) chloridezinc phospho­rus chloridezinc(II) chloride

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Area of Science:

  • Solid-state chemistry
  • Inorganic chemistry
  • Crystallography

Background:

  • Mixed-metal halides represent a diverse class of compounds with varied structural motifs.
  • Understanding the synthesis and structure of novel compounds is crucial for expanding chemical knowledge.

Purpose of the Study:

  • To report the synthesis and crystal structure of a new compound, zinc phosphorus hepta-chloride (ZnPCl7).
  • To characterize the structural features and bonding in ZnPCl7.

Main Methods:

  • Single crystal X-ray diffraction was employed to determine the crystal structure.
  • The synthesis involved reacting zinc chloride (ZnCl2) with phosphorus pentachloride (PCl5) at elevated temperatures.
  • Bond-valence sum calculations were used to support oxidation state assignments.

Main Results:

  • A novel compound, formulated as zinc phosphorus hepta-chloride (ZnPCl7) or {[PCl4][ZnCl3]}n, was successfully synthesized.
  • ZnPCl7 crystallizes in the orthorhombic space group Ama2, featuring isolated [PCl4]+ tetrahedra and one-dimensional chains of corner-sharing ZnCl4 tetrahedra.
  • Specific atomic positions and crystallographic symmetry elements were identified.

Conclusions:

  • The study reports an unprecedented compound, ZnPCl7, with a unique extended structure.
  • The findings contribute to the understanding of mixed-metal halide chemistry and structural diversity.
  • The results highlight the potential for novel structures in reactions between metal chlorides and non-metal chlorides.