Cyanoplatinate

Cyanoplatinate is a chemical compound with the formula Pt(CN)4^2-. It is a coordination complex consisting of a platinum(II) ion coordinated by four cyanide ions. The compound is a bright blue crystalline solid, which is notable for its color and its use in analytical chemistry.

Cyanoplatinate is formed by the reaction of platinum(II) salts with sodium cyanide. The reaction is typically carried out in an alkaline medium to ensure the formation of the cyanoplatinate ion. The compound is stable in aqueous solution and can be isolated as a solid by precipitation with a base.

In analytical chemistry, cyanoplatinate is used as a qualitative test for platinum. The bright blue color of the precipitate indicates the presence of platinum in a sample. The test is specific for platinum and does not interfere with other metals commonly found in analytical samples.

Cyanoplatinate is also used in the synthesis of other platinum complexes. Its four cyanide ligands can be replaced by other ligands to form a variety of platinum coordination compounds. These compounds have a wide range of applications in catalysis, materials science, and medicine.

The toxicity of cyanoplatinate is a concern due to the presence of cyanide ions. Exposure to high concentrations of cyanoplatinate can lead to cyanide poisoning, which can be fatal. Therefore, handling and disposal of cyanoplatinate must be done with appropriate safety measures.