Pentaamminechlororhodium dichloride
Names
Other names
Claus' salt,
Pentaamminechlororhodium dichloride, chloropentaamminerhodium dichloride, chloropentaamminerhodium chloride, chloropentamminerhodium(III) dichloride, chloropentamminerhodium(III) chloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.082
EC Number
  • 237-505-2
  • InChI=1S/3ClH.5H3N.Rh/h3*1H;5*1H3;/q;;;;;;;;+3/p-3
    Key: ICJGGTVWZZBROS-UHFFFAOYSA-K
  • [Cl-].Cl[Ru-3]([NH3+])([NH3+])([NH3+])([NH3+])[NH3+].[Cl-]
Properties
[RhCl(NH3)5]Cl2
Appearance yellow solid
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Pentamminechlororhodium dichloride is the dichloride salt of the coordination complex [RhCl(NH3)5]2+. It is a yellow, water-soluble solid. The salt is an intermediate in the purification of rhodium from its ores.

As shown by X-ray crystallography, the salt consists of the octahedral complex [RhCl(NH3)5]2+ and two chloride counterions.[1] It forms from the reaction of rhodium trichloride and ammonia in ethanol.[2] Two chloride anions are labile, whereas the coordinated chloride ligand is not.

Treatment of [RhCl(NH3)5]Cl2 with zinc dust in the presence of ammonia gives the hydride complex [RhH(NH3)5]2+.[2][3]

References

  1. ↑ Hambley, Trevor W.; Lay, Peter A. (1986). "Comparisons of pi-Bonding and Hydrogen Bonding in Isomorphous Compounds: [M(NH3)5Cl]Cl2 (M = Cr, Co, Rh, Ir, Ru, Os)". Inorganic Chemistry. 25 (25): 4553–4558. doi:10.1021/ic00245a020.
  2. 1 2 Osborn, J. A.; Thomas, K.; Wilkinson, G. (1972). "Pentaamminechlororhodium(III) Dichloride and Pentaamminehydridorhodium(III) Sulfate". Inorganic Syntheses. 13: 213–215. doi:10.1002/9780470132449.ch43.
  3. ↑ Thomas, K.; Osborn, J. A.; Powell, A. R.; Wilkinson, G. (1968). "The Preparation of Hydridopentammine- and Hydridoaquotetramminerhodium(III) Sulphates and Other Salts; the Formation of Alkyl and Fluoroalkyl Derivatives". Journal of the Chemical Society A: 1801. doi:10.1039/j19680001801.
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