K2SbCl6

K2SbCl6 is the chemical formula for potassium hexachloroantimonate(V). This inorganic compound is a salt composed of potassium cations (K+) and hexachloroantimonate(V) anions (SbCl6-). It typically appears as a white crystalline solid. The antimony in the hexachloroantimonate(V) anion is in the +5 oxidation state.

K2SbCl6 can be prepared through the reaction of antimony pentachloride (SbCl5) with potassium chloride (KCl) in an appropriate solvent, often hydrochloric acid. The reaction involves the formation of the complex anion where antimony is coordinated to six chloride ligands. The compound is relatively stable under normal conditions but can decompose when heated strongly.

This compound has found applications primarily in analytical chemistry and as a reagent. It is known for its use in the gravimetric determination of certain metal ions. Due to the nature of the hexachloroantimonate(V) anion, K2SbCl6 can act as a source of oxidizing agents under specific reaction conditions. Its solubility in water is limited, and it is generally more soluble in certain acidic solutions.