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Phenylarsonic acid

Phenylarsonic acid is the chemical compound with the formula C6H5AsO(OH)2, commonly abbreviated PhAsO3H2. This colourless solid is an organic derivative of arsenic acid, AsO(OH)3, where one OH group has been replaced by a phenyl group. The compound is a buffering agent and a precursor to other organoarsenic compounds, some of which are used in animal nutrition, e.g. 4-hydroxy-3-nitrobenzenearsonic acid.

Preparation and structure

PhAsO3H2 can be prepared in several routes, but a common one entails treatment of phenyl diazonium salts with sodium arsenite (prepared from arsenious acid and base) in the presence of a copper(II) catalyst. : + NaAsO3H2 → C6H5AsO3H2 + Na+ + N2 Related derivatives are prepared similarly. It was first prepared by Michaelis and Loenser.{{cite journal

References

References

  1. Bullard, R. H.; Dickey, J. B. "Phenylarsonic Acid" Organic Syntheses, Collected Volume 2, pages 494 (1943). http://www.orgsyn.org/orgsyn/pdfs/CV2P0494.pdf
  2. "Archived copy".
  3. Struchkov, Yu. T. "Crystal and molecular structure of phenylarsonic acid" Russian Chemical Bulletin 1960, Volume 9, 1829-1833. {{doi. 10.1007/BF00907739
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phenyl-compounds arsonic-acids
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