|Jmol-3D images||Image 1|
|Melting point||−78 °C; −108 °F; 195 K|
|Boiling point||111 °C; 232 °F; 384 K|
|Solubility in water||organic solvents|
|Related compounds||Dimethyl methylphosphonate|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Trimethylphosphite is  an organophosphorus compound with the formula P(OCH3)3, often abbreviated P(OMe)3. This colorless liquid is used as a ligand in organometallic chemistry and as a reagent in organic synthesis. The molecule features a pyramidal phosphorus(III) center bound to three methoxide groups.
Synthesis and reactions
Although commercially available, trimethylphosphite is prepared from phosphorus trichloride:
It is susceptible to oxidation to trimethyl phosphate.
As a ligand, trimethylphosphite has a smaller cone angle and better acceptor properties relative to trimethylphosphine. A representative derivative is the colorless, tetrahedral complex Ni(P(OMe)3)4 (m.p. 108 °C). The tridentate ligand called the Klaui ligand is derived from trimethylphosphite. The formation of this ligand illustrates the susceptibility of trimethylphosphite (and metal complexes thereof) to the Arbuzov reaction.
- A comprehensive guide to the hazardous properties of chemical substances - Pradyot Patnaik - Google Kitaplar
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