The covalent compound PCl5 is known as phosphorus pentachloride.
Phosphorus pentachloride is formed by the covalent bonding between one phosphorus atom and five chlorine atoms. The ‘penta’ prefix in the name indicates the presence of five chlorine atoms. In this compound, phosphorus acts as the central atom and forms five single covalent bonds with each chlorine atom. PCl5 is commonly used in organic synthesis and as a chlorinating agent in various chemical reactions.