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Methylphosphonyl dichloride (DC) or dichloro is an organophosphorus compound. It has commercial application in oligonucleotide synthesis, [1] but is most notable as being a precursor to several chemical weapons agents. It is a white crystalline solid that melts slightly above room temperature. [2]
Methyldichlorophosphine is produced by alkylation of phosphorus trichloride with methyl iodide followed by reduction of the resulting phosphonium salt with iron powder: [2] [3] CH 3 I + PCl 3 + AlCl 3 → [CH 3 PCl 3 ] + AlCl 3 I −
Methylphosphonic acid is an organophosphorus compound with the chemical formula CH 3 P(O)(OH) 2. The phosphorus center is tetrahedral and is bonded to a methyl group, two OH groups and an oxygen. Methylphosphonic acid is a white, non-volatile solid that is poorly soluble in organic solvent but soluble in water and common alcohols.
General ester of phosphonic acid; in fact, the phosphorus has a formal charge of +1, the oxygen above it has a formal charge of −1, and the bond between them is single. In organic chemistry, phosphonates or phosphonic acids are organophosphorus compounds containing C−PO(OR) 2 groups, where R is an organic group (alkyl, aryl).
[2] Dimethyl methylphosphonate is a schedule 2 chemical as it may be used in the production of chemical weapons. It will react with thionyl chloride to produce methylphosphonic acid dichloride, which is used in the production of sarin and soman nerve agents. Various amines can be used to catalyse this process. [3]
Methylphosphine is the simplest organophosphorus compound with the formula CH 3 PH 2, often written MePH 2. It is a malodorous gas that condenses to a colorless liquid. It can be produced by methylation of phosphanide salts: [1] KPH 2 + MeI → MePH 2 + KI
Its chemical formula is CH 3 POF 2. It is a Schedule 1 substance under the Chemical Weapons Convention . It is used for production of sarin and soman as a component of binary chemical weapons ; an example is the M687 artillery shell, where it is used together with a mixture of isopropyl alcohol and isopropyl amine , producing sarin .
[2] Hydrolysis of methyldichlorophosphine yields methylphosphinic acid, [ 3 ] Methylphosphinic acid is a common byproduct of the hydrolysis of various CH 3 P-containing esters and amides, as occur in pesticides for example.