Triethylphosphite is an organophosphorus compound with the formula P(OCH2CH3)3, often abbreviated P(OEt)3. This colorless liquid is used as a ligand in organometallic chemistry and as a reagent in organic synthesis, and has a 31P NMR signal at around +139 ppm with reference to a phosphoric acid standard. The molecule features a pyramidal phosphorus(III) center bound to three ethoxide groups. Triethylphosphite is prepared by treating phosphorus trichloride with ethanol in the presence of a base, typically a tertiary amine: PCl3 + 3 EtOH + 3 R3N → P(OEt)3 + 3 R3NH+Cl− Of the many related compounds can be prepared similarly, triisopropyl phosphite is an example (b.p. 43.5 °C/1.0 mm CAS# 116-17-6).
|Storage temp:Flammables area|
|Vapour:3.19mmHg at 25°C|
|Stability:Stable at room temperature in closed containers under normal storage and handling conditions.|
Safety and Handling
Risk Statements:R10; R20/22