Ammonium hexaiodoplatinate(IV)

Ammonium hexaiodoplatinate(IV)
Names
Other names
Ammonium hexaiodoplatinate
Identifiers
3D model (JSmol)
  • InChI=1S/6HI.2H3N.Pt/h6*1H;2*1H3;/q;;;;;;;;+4/p-4
    Key: MMORLWYTUHXLHL-UHFFFAOYSA-J
  • [NH4+].[NH4+].I[Pt-2](I)(I)(I)(I)I
Properties[1]
(NH4)2[PtI6]
Molar mass 992.589 g·mol−1
Appearance dark-red solid
Density 4.68 g/cm3
sparingly soluble
Structure[1]
cubic
Fm3m
a = 1115.8 pm, b = 1115.8 pm, c = 1115.8 pm
α = 90°, β = 90°, γ = 90°
1389×106 pm3
4 units per cell
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Ammonium hexaiodoplatinate(IV) is an inorganic compound with the chemical formula (NH4)2[PtI6]. It forms dark-red, cubic crystals.

Preparation

Ammonium hexaiodoplatinate can be prepared by heating platinum tetraiodide or hexachloroplatinic acid in a saturated solution of ammonium iodide in the presence of hydroiodic acid and iodine.[1]

Chemical properties

The compound is unstable and decomposes in aqueous solutions:

(NH4)2[PtI6] → 2NH4I + PtI4

References

  1. 1 2 3 Thiele, Gerhard; Mrozek, Christian; Kämmerer, Dieter; Wittmann, Kurt (1983-08-01). "Über Hexaiodoplatinate(IV) M2PtI6 (M = K, Rb, Cs, NH4, Tl) Darstellungsverfahren, Eigenschaften und Kristallstrukturen / On Hexaiodoplatinates(IV) M2PtI6 (M = K, Rb, Cs, NH4, Tl) -Preparation, Properties and Structural Data". Zeitschrift für Naturforschung B. 38 (8): 905–910. doi:10.1515/znb-1983-0802. ISSN 1865-7117.

Further reading

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