The compound P2S3 is named diphosphorus trisulfide.
In this compound, there are two phosphorus (P) atoms and three sulfur (S) atoms. The ‘di’ prefix in diphosphorus indicates that there are two phosphorus atoms, while the ‘tri’ prefix in trisulfide signifies that there are three sulfur atoms. This naming follows the conventions of molecular nomenclature, which uses prefixes to denote the number of each element present in the compound. Diphosphorus trisulfide is commonly used in various chemical applications, including as a precursor in the synthesis of phosphorous compounds.