AsF5 Research Articles

Phosphonitrilic derivatives. Part XVII. Complexes of phosphonitrilic fluorides with antimony pentafluoride

Crystalline complexes of the type (NPF2)n, 2SbF5(n= 3–6) are formed when equimolar amounts of (NPF2)n and antimony pentafluoride are allowed to react at 25°. With arsenic pentafluoride, N5P5F10 forms a 1 : 1 complex which readily dissociates, but with phosphorus pentafluoride or boron trifluoride no complex formation is observed at 25°. Fluorine-bridged structures are suggested for the antimony pentafluoride complexes.

Mean amplitudes of vibration and Coriolis constants for phosphorus and arsenic pentafluorides

Mean amplitudes of vibration and Coriolis constants for phosphorus and arsenic pentafluorides

The vibrational Raman spectra of some complexes formed between the tetrafluorides of Group VI elements and antimony and arsenic pentafluorides

This paper reports the Raman spectra of the complexes SF4,SbF5,SeF4,SbF5, TeF4,SbF5, and SeF4,AsF5 in the molten state, the Raman spectra of the salts KSbF6 in NN-dimethylformamide and KAsF6 in acetonitrile, the infrared spectra of KSbF6 and KAsF6 as Nujol mulls in the range 650–2000 cm.–1, and the Raman spectrum of liquid arsenic trifluoride. Interpretation of the spectra of KSbF6 and KAsF6 leads to assignments for the anions SbF6– and AsF6–. The spectra of the molten complexes SF4,SbF5, SeF4,SbF5, and SeF4,AsF5 can be interpreted in terms of the ionic formulations SF3+SbF6–, SeF3+SbF6–, and SeF3+AsF6–. Assignments are made for the SF3+ and SeF3+ ions, and are compared with those for the isoelectronic PF3 and AsF3 molecules. In the case of the complex TeF4,SbF5 the situation is less clear and no decision is possible between the two more plausible alternatives of ionisation into distorted ions TeF3+ and SbF6– or a fluorine bridged structure F3TeFSbF5. Finally, the stability and degree of ionisation in complexes of this type are discussed in terms of the relative stabilities of the anions and cations that would be formed. Investigations were also made of the systems SF4/AsF3, SeF4/AsF3, and TeF4/AsF3. No evidence for complex formation was obtained.

Reaction of tetrafluorohydrazine with arsenic pentafluoride. Evidence for the existence of N2F3+ salts

Reaction of tetrafluorohydrazine with arsenic pentafluoride. Evidence for the existence of N2F3+ salts

Fluorine Bomb Calorimetry. XIII. The Enthalpy of Formation of Arsenic Pentafluoride1

Fluorine Bomb Calorimetry. XIII. The Enthalpy of Formation of Arsenic Pentafluoride¹

The action of an arsenic pentafluoride—Chlorine trifluoride complex on rats

When the highly reactive fluorinating agent, AsF 5·ClF 3 in ClF 3, designated ACFS, was applied to the clipped skin of the rat, a fourth degree burn of nonspecific type was produced. The entire thickness of the skin and part of the underlying musculature were involved. After 2 weeks, normal healing of the burn was well advanced. In the dosage employed, 30–90 mg, the burn produced by ACFS was sufficient to elicit signs of shock. Activity of the animals was reduced and a considerable degree of hemoconcentration occurred. Apart from the burn itself, other pathologic change was almost entirely absent, Histologic evidence of systemic chemical intoxication could not be adduced. The amount of arsenic present in the skin of the burned area decreased with the passage of time following application of the agent. A concomitant increase in blood arsenic concentration was noted, continuing for at least 48 hours. The levels attained exceeded those seen in rats seriously poisoned with arsenite or lewisite. It was found that the arsenic in the blood of ACFS-burned rats was mainly associated with the erythrocytes, specifically with the hemoglobin. Dialysis experiments indicated that this arsenic was relatively firmly bound. Fractionation of the arsenic compounds present in dialyzates of whole blood from ACFS-burned rats revealed that most of the arsenic was in a pentavalent from, although the presence of a small proportion of trivalent compound was demonstrated. In addition to arsenic, fluorine appeared in the blood of rats after the administration of ACFS to the skin. It has been concluded that the most significant sequelae of the ACFS burn are related to effects on the distribution of body fluids and are not referable to the absorption of toxic arsenic and fluorine compounds.