Appearance White Solid | ||
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Methylphosphonic acid is an organophosphorus compound with the chemical formula. CH3P(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.
Preparation
Methylphosphonic acid can be prepared via the Michaelis-Arbuzov reaction from triethylphosphite:
CH3Cl + P(OC2H5)3 → CH3PO(OC2H5)2 + C2H5ClThe dialkylphosphonate is then treated with chlorotrimethylsilane:
CH3PO(OC2H5)2 + 2 Me3SiCl → CH3PO(OSiMe3)2 + 2 C2H5ClThe siloxyphosphinate is then hydrolyzed:
CH3PO(OSiMe3)2 + 2H2O → CH3PO(OH)2 + 2 HOSiMe3References
Methylphosphonic acid Wikipedia(Text) CC BY-SA