NH42PdCl6

Ammonium hexachloropalladate(IV) is an inorganic chemical compound with the formula (NH4)2PdCl6. It is a salt formed from the ammonium cation (NH4+) and the hexachloropalladate(IV) anion (PdCl6^2-). This compound is typically encountered as a red or reddish-brown crystalline solid.

It can be synthesized by reacting palladium(IV) oxide with hydrochloric acid in the presence of ammonium chloride. Another method involves the oxidation of palladium(II) salts in the presence of ammonium chloride. The palladium in this compound is in the +4 oxidation state.

Ammonium hexachloropalladate(IV) is sparingly soluble in water. It is a relatively stable compound under normal conditions but can decompose upon heating, releasing volatile products. Its applications are limited, but it has been investigated in some catalytic processes and as a precursor for palladium-based materials. Due to the presence of palladium, it is considered a precious metal compound. Like many palladium complexes, it should be handled with appropriate safety precautions, as it can be an irritant. Its crystalline structure has been studied using X-ray diffraction.