Dimethylphosphite Names Preferred IUPAC name Dimethyl phosphonate Other names Phosphonic acid, dimethyl ester Identifiers CAS Number * 868-85-9 Y 3D model (JSmol) * Interactive image ChEMBL | * ChEMBL65359 ChemSpider | * 85582 ECHA InfoCard | 100.011.622 PubChem CID * 94853 UNII | * ST4TBO000H Y CompTox Dashboard (EPA) * DTXSID5020493 InChI * InChI=1S/C2H7O3P/c1-4-6(3)5-2/h3H,1-2H3 Key: DLQDGVZAEYZNTG-UHFFFAOYSA-N SMILES * COP(O)OC Properties Chemical formula | C2H7O3P Molar mass | 110.049 g·mol−1 Appearance | colorless liquid Density | 1.20 g/cm3 Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references Chemical compound Dimethyl hydrogen phosphite (DMHP), also known as Dimethylphosphite, is an organophosphorus compound with the formula (CH3O)2P(O)H. It is a reagent for generating other organophosphorus compounds, exploiting the high reactivity of the P-H bond. The molecule is tetrahedral. It is a colorless liquid. The compounds can be prepared by methanolysis of phosphorus trichloride or by heating diethylphosphite in methanol.[1] Due to the presence of hydrogen, a "soft" ligand, the compound resonates. DMHP exists in chemical equilibrium, in two structures. One of the structures has a lone electron cloud, which is nucleophilically attacking the remaining tetrahedral structure. Due to the structural equilibrium tending towards the phosphonate, this reaction is slow, needing a chemical or electromagnetic catalyst (heat). This tautomeric nature of DMHP made it desirable as a precursor to the G-series compounds, and it was the most successful among all other phosphonate precursors.[2] The now obsolete process, which used it as a precursor, was called the DMHP process, investigated by Otto Ambros' team and implemented to scale sarin production.[3] ## References[edit] 1. ^ Balint, Erika; Tajti, Adam; Drahos, Laszlo; Ilia, Gheorge; Keglevich, Gyorgy (2013). "Alcoholysis of Dialkyl Phosphites Under Microwave Conditions". Current Organic Chemistry. 17 (5): 555–562. doi:10.2174/1385272811317050010.`{{cite journal}}`: CS1 maint: uses authors parameter (link) 2. ^ Sipri - Chemical Weapons: Destruction and Conversion. p 57-62 3. ^ Mark A. Prelas, Dabir S. Viswanath,. 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