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Ammonium hexachlororhodate(III)

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Ammonium hexachlororhodate(III)
(NH4)3RhCl6.svg
Names
IUPAC name
Ammonium hexachlororhodate(III)
Other names
  • Ammonium chlororhodate(III)
  • Triammonium hexachlororhodate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.770 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 239-364-2
PubChem CID
  • InChI=1S/6ClH.3H3N.Rh/h6*1H;3*1H3;/q;;;;;;;;;+3/p-3
    Key: OJNYBYILSUWBHM-UHFFFAOYSA-K
  • [Rh+3]([Cl-])([Cl-])([Cl-])([Cl-])([Cl-])[Cl-].[NH4+]
Properties
Cl6H12N3Rh
Molar mass 369.72 g·mol−1
Appearancered crystals
Density 2.2 g/cm3
slightly soluble
Hazards
GHS labelling: [1]
GHS-pictogram-acid.svg GHS-pictogram-exclam.svg
Danger
H315, H318, H319
P264, P264+P265, P280, P302+P352, P305+P351+P338, P305+P354+P338, P317, P321, P332+P317, P337+P317, P362+P364
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium hexachlororhodate(III) is an inorganic compound with the chemical formula (NH4)3RhCl6(H2O). It is a red, diamagnetic solid that is slightly soluble in water. It is one of several salts of hexachlororhodate.

Contents

Structure

A monohydrate has been characterized by X-ray crystallography. [2] It forms orthorhombic crystals (space group: Pnma, a = 1.2213, b = 0.7012, c = 1.4151 nm, α = β = γ = 90°). [3]

Preparation and reactions

Ammonium hexachlororhodate(III) can be prepared by treating rhodium trichloride with excess ammonium chloride solution:

RhCl3 + 3NH4Cl → (NH4)3RhCl6

The compound undergoes partial hydrolysis in dilute aqueous solutions:[ citation needed ]

(NH4)3[RhCl6] + H2O → (NH4)2[RhCl5(H2O)] + NH4Cl

References

  1. ↑ PubChem. "Triammonium hexachlororhodate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-03-23.
  2. ↑ Bukanova, A.E.; Sergienko, V.S.; Sidorova, T.P.; Belan, V.N.; Shubochkin, L.K.; Porai Koshits, M.A. (1988). "Preparation and crystal structure of (NH4)3(RhCl6)(H2O), a Product of the Reaction of Rhodium Chloride with L-Aspargine". Russian Journal of Inorganic Chemistry. 33: 379-382.
  3. ↑ Villars, Pierre; Cenzual, Karin; Gladyshevskii, Roman (2017). Handbook of inorganic substances 2017. Inorganic Substances. Berlin Boston: De Gruyter. ISBN   978-3-11-044408-7.
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