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 Edit this at Wikidata
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).

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]

Related compounds

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. ^ a b 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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