Chloroplatinic acid

Other methods include exposing an aqueous suspension of platinum particles to chlorine gas, or via electrolysis.

Newer literature indicates that this is not the case, and that once the nitric acid has been driven off, samples prepared via this method contain no detectable nitrogen.

[6] According to X-ray crystallography, hexachloroplatinic acid consists of octahedral [PtCl6]2- ions linked by hydrogen bonding.

Determinations were done in 85% (v/v) alcohol solutions with excess platinate ions, and the precipitated product was weighed.

[8] Like many platinum compounds, chloroplatinic acid is a catalyst (or precatalyst) for hydrogenation and related reactions.

As first reported by John Speier and colleagues from Dow Corning, it catalyzes the addition of hydrosilanes to olefins, i.e. hydrosilylation.

Structural formulas of the component ions of chloroplatinic acid
Two rough red crystals in a glass tube, next to a worn leathery red and white label saying "platina chloride"
NFPA 704 four-colored diamond Health 4: Very short exposure could cause death or major residual injury. E.g. VX gas Flammability 0: Will not burn. E.g. water Instability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorus Special hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
Orange liquid containing bubbles
Platinum being dissolved in hot aqua regia
structure of solid hexachloroplatinic acid.