fosforchloriden

Fosforchloriden, or phosphorus chlorides, are a group of inorganic compounds containing phosphorus and chlorine. The most important members are phosphorus trichloride (PCl3), phosphorus pentachloride (PCl5), and phosphorus oxychloride (POCl3). They are typically colorless to pale materials, with strong, penetrating odors, and they are highly reactive with water and moisture. All forms are corrosive and toxic, and their vapors can be irritating to the eyes, skin, and respiratory tract.

Phosphorus trichloride (PCl3) is a colorless to yellow liquid at room temperature. It is a key precursor in the synthesis of organophosphorus compounds, including phosphites and phosphoramidates, and serves as a ligand in coordination chemistry. It hydrolyzes readily in water to form phosphorous acid and hydrochloric acid.

Phosphorus pentachloride (PCl5) is a white crystalline solid that sublimes under ambient conditions. It acts as a versatile chlorinating and phosphorylating agent, converting alcohols, carboxylic acids, and other substrates to their corresponding chlorides or phosphate derivatives. It hydrolyzes to phosphoric acid and hydrogen chloride in the presence of moisture.

Phosphorus oxychloride (POCl3) is a colorless, oily liquid used chiefly as a dehydrating and chlorinating agent in organic and inorganic synthesis. It is employed in the preparation of phosphate esters and various organophosphorus compounds and can hydrolyze to phosphoric acid and hydrochloric acid upon contact with water.

Production of phosphorus chlorides generally involves chlorination of elemental phosphorus or phosphorus oxides under controlled conditions. Direct routes vary by compound, but all are handled and stored under strictly dry, inert, or controlled atmospheres to prevent hydrolysis and corrosion. Safe handling and appropriate ventilation are essential due to their reactivity and toxicity.