Di(n-octyl)arsenic acid (DOAA) as a reagent for liquid-liquid extraction—I

Olivares, A.M.; Irgolic, Kurt J.

doi:10.1016/0022-1902(72)80340-3

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…Such an adduct has been postulated in the extraction of HI by di-n-octylarsinic acid and the adduct Me 2 AsO 2 H·HCl has been prepared. 22 In our case, the actual structure of the adduct under a limited amount of HI in methanol (which has a moderate dielectric constant) may be dimeric and not monomeric 22 (Scheme 2).…”

Section: Methodsmentioning

confidence: 97%

Ascorbic Acid/Iodine and Triphenylphosphine/Iodine as Reducing Agents for the As(V)[dbnd]O Group

Sideris

Ioannou

2006

Phosphorus, Sulfur, and Silicon and the Related Elements

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The scope of ascorbic acid/iodine and triphenylphosphine/iodine in methanol for the direct reduction of arsenic(V) compounds having the As O group has been investigated. Ascorbic acid/iodine reduces arsonic acids, diphenylarsinic acid (but not dimethylarsinic acid), and triphenylarsine oxide. The rates of reduction depend on the electronic effects of the ligands bound to arsenic and on the hydrogen-bonding strength of the species, when present. When the As(V) compound has an NH 2 or an NH + 3 group, the reduction product reacts with a ketonic form of dehydroascorbic acid, giving condensation product(s). Triphenylphosphine/iodine reduced slowly the zwitterionic o-aminophenylarsonic acid but reduced faster the hydrochloric acid salt of the same acid. It reduced dimethylarsinic acid as well because the powerful electron-withdrawing Ph 3 P + coordinated to As O seems to outweigh the electronic and hydrogen bonding effects.

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Section: Methodsmentioning

confidence: 97%