HexachlororhodateIII

Hexachlororhodate(III) is an inorganic chemical compound with the formula RhCl63-. It is a coordination complex where a central rhodium atom in the +3 oxidation state is coordinated to six chloride ligands. The counterion is typically a cation, such as sodium, potassium, or ammonium, to balance the negative charge of the hexachlororhodate(III) anion. These salts are generally soluble in water and exhibit a characteristic red or orange color.

Hexachlororhodate(III) compounds are prepared through various methods, often involving the reaction of rhodium metal or rhodium oxides with hydrochloric acid and an oxidizing agent, or by chlorination of rhodium(III) chloride. The synthesis typically requires careful control of reaction conditions to achieve the desired complex.

In terms of chemical properties, hexachlororhodate(III) salts can undergo ligand exchange reactions, where chloride ligands are replaced by other ligands, such as water or ammonia. They are also involved in redox chemistry, although the Rh(III) oxidation state is relatively stable. These complexes have found applications in catalysis, particularly in homogeneous catalysis for various organic transformations. They can also serve as precursors for the synthesis of other rhodium-containing compounds. The stability and reactivity of hexachlororhodate(III) make it a useful reagent in inorganic and organometallic chemistry.