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Structural formula
Ball-and-stick model
Preferred IUPAC name
Phenylphosphonous dichloride
Other names
Phenylphosphorus dichloride
644-97-3 YesY
ChemSpider 12053 YesY
ECHA InfoCard 100.010.388
Jmol 3D model Interactive image
PubChem 12573
RTECS number TB2478000
Molar mass 178.98 g·mol−1
Appearance colorless liquid
Odor acrid, pungent
Density 1.3190 g/mL
Melting point −51 °C (−60 °F; 222 K)
Boiling point 222 °C (432 °F; 495 K)
Solubility miscible in benzene, CS2, chloroform
Safety data sheet Fisher MSDS
Corrosive (C)
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g., fluorine Special hazard W: Reacts with water in an unusual or dangerous manner. E.g., cesium, sodiumNFPA 704 four-colored diamond
Flash point 101 °C (214 °F; 374 K)
159 °C (318 °F; 432 K)
Lethal dose or concentration (LD, LC):
200 mg/kg (oral, rat)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Dichlorophenylphosphine is an organophosphorus compound with the formula C6H5PCl2. This colourless viscous liquid is commonly used in the synthesis of phosphine ligands.

Dichlorophenylphosphine is commercially available. It may be prepared by an electrophilic substitution of benzene by phosphorus trichloride, catalyzed by aluminium chloride.[1] The compound is an intermediate for the synthesis of other chemicals for instance dimethylphenylphosphine:

C6H5PCl2 + 2 CH3MgI → C6H5P(CH3)2 + 2 MgICl

Dichlorophenylphosphine undergoes the McCormack reaction upon treatment with dienes to give phospholes.


  1. ^ B. Buchner and L. B. Lockhart, Jr. (1963). "Phenyldichlorophosphine". Org. Synth. ; Coll. Vol., 4, p. 784