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Phosphoryl chloride (commonly called phosphorus oxychloride) is a colourless liquid with the formula P O Cl 3. It hydrolyses in moist air releasing phosphoric acid and fumes of hydrogen chloride . It is manufactured industrially on a large scale from phosphorus trichloride and oxygen or phosphorus pentoxide . [ 4 ]
Phase behavior Triple point? K (? °C), ? Pa Critical point: 602 K (329 °C), ? Pa Std enthalpy change of fusion, Δ fus H o? kJ/mol Std entropy change
Phosphoric chloride difluoride POF 2 Cl is a colourless gas. At one atmosphere pressure the gas condenses to a liquid at 3.1 °C and freezes at −96.4. [ 3 ] Alternate names are difluorophosphoryl chloride [ 3 ] or phosphoryl chloride difluoride .
Values are given in terms of temperature necessary to reach the specified pressure. Valid results within the quoted ranges from most equations are included in the table for comparison. A conversion factor is included into the original first coefficients of the equations to provide the pressure in pascals (CR2: 5.006, SMI: -0.875).
Vapor pressure: 13.3 kPa Magnetic susceptibility (χ) −63.4·10 −6 cm 3 /mol Refractive index (n D) ... Phosphoryl chloride; Phosphorus trifluorodichloride ...
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Upon treatment with PCl 5, carboxylic acids convert to the corresponding acyl chloride. [12] The following mechanism has been proposed: [13] It also converts alcohols to alkyl chlorides. Thionyl chloride is more commonly used in the laboratory because the resultant sulfur dioxide is more easily separated from the organic products than is POCl 3.
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