Dissolution equilibria of arsenic pentafluoride in anhydrous hydrogen fluoride

Syntheses and Crystal Structures of [H3O]+/M2+ (M = Fe, Zn, Cu, Hg) Salts with [AsF6]–

“…When AsF 5 is dissolved in aHF there is an equilibrium between [As 2 F 11 ] – , [AsF 6 ] – and AsF 5 . As the concentration is increased, the equilibrium is shifted to AsF 5 , which is a much stronger oxidant than [AsF 6 ] – 6,7. An essential requirement for the preparation of stable aHF solutions of M II (M = V, Ti) is to remove the surface oxide layer from the metals 6.…”

“…As the concentration is increased, the equilibrium is shifted to AsF 5 , which is a much stronger oxidant than [AsF 6 ] -. [6,7] An essential requirement for the preparation of stable aHF solutions of M II (M = V, Ti) is to remove the surface oxide layer from the metals. [6] Oxygen can be converted to water, which is protonated.…”

“…The similarity of all of the Raman spectra is in agreement with the crystallographic results where it was found that all of the compounds are isostructural. (7) v(As-F-M) 384 (7) 383 (10) 386 (20) 386 (7) 388(10) v 5 360 (7) 355 (10) 357 (25) 360 (5) 358(5) v 5…”

Co-exposure to arsenic and fluoride on oxidative stress, glutathione linked enzymes, biogenic amines and DNA damage in mouse brain

“…It has been reported that large fraction of ingested fluoride is absorbed from the stomach as hydrofluoric acid (HF) [53] and absorption of fluoride is more pronounced in acidic medium than in basic or neutral medium. Fujisawa et al [54] have reported formation of AsF 5 , As 2 F 11 − and AsF 6 − in the presence of HF and recorded raman spectra of HF-AsF 5 system. They prepared AsF 5 by the reaction of elemental arsenic and fluorine.…”

Purification of dilute hydrofluoric acid by commercial ion exchange resins

“…With respect to PO 4 3− , a small fraction of H 2 PO 4 − is predicted by Visual Minteq. In the case of arsenic, two oxidation states are usually found in aqueous solutions; arsenic(V) may form the anionic complex AsF 6 − in HF matrices [24]. However, former studies showed that arsenic was mainly present in trivalent state in HF samples [7].…”