Bis(benzonitrile)dichloroplatinum(II) is a square-planar platinum(II) complex with the formula PtCl₂(NCPh)₂. It is a yellow to orange crystalline solid that is sensitive to light and moisture. This compound is a versatile precursor in organometallic chemistry and materials science due to the labile nature of the benzonitrile ligands, which can be readily displaced by other donor molecules. Its primary application is as a key starting material for the synthesis of various platinum-based complexes. These complexes are extensively studied for their photophysical properties and are used in the development of organic light-emitting diodes (OLEDs), phosphorescent sensors, and photocatalysts. The compound itself can serve as a catalyst or catalyst precursor in certain organic transformations, such as hydrosilylation reactions. Handling requires precautions due to its sensitivity and the general toxicity associated with platinum compounds. It should be stored under an inert atmosphere, protected from light, and used in a well-ventilated fume hood.