18424-16-3

Basic information

• Product Name: CESIUM HEXAFLUOROARSENATE
• Synonyms: CESIUM HEXAFLUOROARSENATE;CAESIUM HEXAFLUOROARSENATE
• CAS NO: 18424-16-3
• Molecular Formula: AsF₆*Cs
• Molecular Weight: 321.82
• Mol File: 18424-16-3.mol
• Article Data: 10

Chemical Properties

• Appearance: /
• CAS DataBase Reference: CESIUM HEXAFLUOROARSENATE(CAS DataBase Reference)
• NIST Chemistry Reference: CESIUM HEXAFLUOROARSENATE(18424-16-3)
• EPA Substance Registry System: CESIUM HEXAFLUOROARSENATE(18424-16-3)

Safety Data

• Hazard Codes: T
• Statements: 23/25-50/53
• Safety Statements: 20/21-28-45
• RIDADR: 1557
• Hazardous Substances Data: 18424-16-3(Hazardous Substances Data)

Usage

General Description

Cesium Hexafluoroarsenate is a chemical compound with the formula CsAsF6. It is classified as an inorganic compound made up of the cesium cation (Cs+) and hexafluoroarsenate anion (AsF6-). Cesium Hexafluoroarsenate is generally used in various scientific research due to its interesting and unique chemical properties. Additionally, due to its composition, it's also considered as a potent source of highly reactive arsenic and fluorine atoms, making it an important reagent in certain synthetic reactions. However, it is essential to handle this chemical with extreme care as it is toxic and can cause harm if improperly managed.

InChI:InChI=1/AsF6.Cs/c2-1(3,4,5,6)7;/q-1;+1

Upstream product

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Relevant articles and documents

Zum Koordinationsverhalten der Lewis-Basen HCN und DCN gegenueber Cp2Ti(AsF6)2

The reaction of Cp2Ti(AsF6)2 (1) in liquid sulfur dioxide with XCN gave the cationic titanocene complexes 2 (X = H, 2; D, 3).The bonding situation between the Lewis acid (Cp2Ti2+) and the Lewis base (XCN) is discussed on the basis of IR data and qualitative MO considerations.A convenient laboratory-scale synthesis of DCN is reported.

Novel synthesis of CIF6+ and BrF6+ salts

For a compound in a given oxidation state, its oxidizing strength increases from its anion to the neutral parent molecule to its cation. Similarly, an anion is more easily oxidized than its neutral parent molecule, which in turn is more easily oxidized than its cation. This concept was systematically exploited in our search for new superoxidizers. Transition metal fluoride anions were prepared in their highest known oxidation states by high temperature/high pressure fluorinations with elemental fluorine and subsequently converted to their more strongly oxidizing cations by a displacement reaction with a strong Lewis acid. The application of this principle resulted in new syntheses for ClF6+AsF6- and BrF6+AsF6- using the highly reactive and thermally unstable NiF3+ cation that was prepared from the reaction of the NiF62- anion with AsF5 in anhydrous HF. Attempts to prepare the known KrF+ and ClO2F2+ cations and the yet unknown XeF7+ cation by the same method were unsuccessful. The results from this and previous studies show that NiF3+ is a stronger oxidative fluorinator than PtF6, but whether its oxidizing strength exceeds that of KrF+ remains unclear. Its failure to oxidize Kr to KrF+ might have been due to unfavorable reaction conditions. Its failure to oxidize ClO2F to ClO2F2+, in spite of its favorable oxidizer strength, is attributed to the high Lewis basicity of ClO2F which results in a rapid displacement reaction of NiF3+ by ClO2F, thus generating the weaker oxidizer NiF4 and the more difficult to oxidize substrate ClO2+. Therefore, the general applicability of this approach appears to be limited to substrates that exhibit a weaker Lewis basicity than the neutral transition metal parent molecule. Compared to KrF+- or PtF6-based oxidations, the NiF3+ system offers the advantages of commercially available starting materials and higher yields, but product purification can be more difficult and tedious than for KrF+.

Seven-coordinated pnicogens. Synthesis and characterization of the SbF72- and BiF72- dianions and a theoretical study of the AsF72- dianion

The novel seven-coordinated BiF72- and SbF72- dianions have been prepared and characterized. The Cs2BiF7, Rb2BiF7, K2BiF7, and Na2BiF7 salts were obtained in high yield by heating BiF5 with an excess of the corresponding alkali metal fluorides to about 250 °C. Attempts failed to prepare the corresponding BiF83- salts or Li2BiF7 under similar conditions. The [N(CH3)4]2BiF7 salt was obtained by the combination of excess N(CH3)4F with BiF5 in CH3CN solution at -31 °C. The (NO2)2BiF7 salt was prepared from BiF5 and a large excess of liquid FNO at -78 °C and decomposes at room temperature to NOBiF6 and FNO. The corresponding Cs2SbF7, K2SbF7, and [N(CH3)4]2SbF7 salts were also synthesized in a similar fashion, but Na2SbF7 was not formed. The pronounced fluoride ion affinity of SbF6- was further demonstrated by the formation of some Cs2SbF7 when dry CsF and CsSbF6 were ball-milled at room temperature. The BiF72- and SbF72- anions, which are the first examples of binary pnicogen compounds with coordination numbers in excess of six, were characterized by vibrational spectroscopy and ab initio electronic structure calculations. They possess pentagonal bipyramidal, highly fluxional structures of D(5h) symmetry, similar to those of IF7 and TeF7-, which are isoelectronic with SbF72-. Although our theoretical calculations indicate that AsF72- is also vibrationally stable, experiments to prepare this dianion were unsuccessful.