Potassium trichloroammineplatinate

Potassium trichloroammineplatinate is an important inorganic coordination compound with the chemical formula K[Pt(NH₃)Cl₃]. It holds a milestone position in the history of coordination chemistry and serves as a key precursor in modern chemical research. Basic Information Chemical name: Potassium trichloroammineplatinate CAS number: 13820-91-2 Molecular formula: Cl₃H₃KNPt or K[Pt(NH₃)Cl₃] Molecular weight: approx. 357.57 g/mol Appearance: yellow to orange crystalline powder Melting point: 255 °C (decomposes) Structure and Properties Central atom: platinum(II) ion (Pt²⁺) Coordination geometry: square planar (typical for Pt(II) complexes) Ligands: three chloride ions (Cl⁻) and one ammonia molecule (NH₃) coordinated to the platinum centre Ionic composition: the complex anion [Pt(NH₃)Cl₃]⁻ and the potassium cation (K⁺) Main Uses Cornerstone of coordination chemistry (historical and educational): one of the key compounds used by Nobel laureate Alfred Werner in the…