Rhodium(III) perchlorate

Rhodium(III) perchlorate
Identifiers
3D model (JSmol)	anhydrous: Interactive image;
PubChem CID	anhydrous: 21688474;
CompTox Dashboard (EPA)	DTXSID301336623 ;
	InChI anhydrous: InChI=1S/3ClHO4.Rh/c32-1(3,4)5;/h3(H,2,3,4,5);/q;;;+3/p-3 Key: LCAWZYUJRNVLIG-UHFFFAOYSA-K;
	SMILES anhydrous: [O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[Rh+3];
Properties
Chemical formula	[Rh(H2O)6](ClO4)3
Appearance	yellow solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Rhodium(III) perchlorate refers to the inorganic compound with the formula Rh(H₂O)₆(ClO₄)₃. It is a hygroscopic yellow solid. It is the perchlorate salt of the tricationic aquo complex [Rh(H₂O)₆]³⁺. The compound is prepared by treating hydrated rhodium(III) chloride and perchloric acid at elevated temperatures:^[1]

[Rh(H₂O)₆]Cl₃ + 3 HClO₄ → [Rh(H₂O)₆](ClO₄)₃ + 3 HCl

The reaction of rhodium(III) hydroxide with concentrated perchloric acid also produce rhodium(III) perchlorate.^[2]

Rh(OH)₃ + 3 HClO₄ → Rh(ClO₄)₃ + 3 H₂O

References

^ Ayres, Gilbert H.; Forrester, John S. (1957). "The Preparation of Rhodium(III) Perchlorate Hexahydrate". Journal of Inorganic and Nuclear Chemistry. 3: 365–366. doi:10.1016/0022-1902(57)80042-6.
^ Gilbert H. Ayres, John S. Forrester. The preparation of rhodium(III) perchlorate hexahydrate. Journal of Inorganic and Nuclear Chemistry, 1957. Vol.3, Iss.6, pp 365-366

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