18424-16-3

Usage

Uses

Used in Scientific Research:
Cesium Hexafluoroarsenate is used as a research compound for its intriguing chemical properties, contributing to the advancement of scientific knowledge in various fields.
Used in Synthetic Reactions:
Cesium Hexafluoroarsenate is used as a reagent in certain synthetic reactions, leveraging its highly reactive arsenic and fluorine atoms to facilitate the formation of desired products.
Used in Pharmaceutical Industry:
Cesium Hexafluoroarsenate is used as a starting material or intermediate in the synthesis of pharmaceutical compounds, taking advantage of its reactive elements to create new drug molecules.
Used in Material Science:
Cesium Hexafluoroarsenate is used in the development of new materials, such as advanced ceramics or glass compositions, where its unique properties can enhance the performance of the final product.

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

Upstream product

• 478167-76-9 chlorine pentafluoride 
• 7784-36-3 arsenic pentafluoride 
• 22750-57-8 cesium azide 
• 13400-13-0 cesium fluoride 
• 88446-29-1 bis(difluorothio)nitronium hexafluoroarsenate(V) 
• 18909-69-8 caesium tetrafluoroborate 
• 86527-33-5 ClF₆⁽¹⁺⁾*AsF₆^(1-)=(ClF₆)(AsF₆) 
• 676353-69-8 bromine pentafluoride 
• 15690-63-8 cesium chloride 
• 90022-57-4 (bis(thiodithiazyl)aminylium)AsF₆ 
• 148336-41-8 cesium pentafluorobenzoate 
• 17029-22-0 potassium hexafluoroarsenate 

Relevant academic research and scientific papers

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.

Reactions of halides with trans-[Re(CO)4(MeCN)(NS)][AsF6]2: Syntheses and structures of trans-[Re(CO)4Cl(NS)][AsF6] and [(OC)5ReN≡S-N=S-N[Re(CO)5]S{=N-S≡NRe(CO) 5}-CH<

From the reactions of trans-[Re(CO)4(MeCN)(NS)][AsF6]2 with CsCl, trans-[Re(CO)4Cl(NS)][AsF6]·MeCN 2 is formed, and with CsF [{Re(CO)5}3(C2H2N5S 4/sub

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+.

RbAsF6, CsAsF6 and RbSbF6: Crystal structures, thermal phase transitions, and vibrational spectra

The title compounds are isostructural to CsSbF6 and crystallize with the KOsF6 structure type (space group R3, Z = 3) with the lattice constants a = 749.7(1) pm, c = 758.9(1) pm (RbAsF6), a = 772.3(1) pm, c = 805.0(1) pm (CsAsF6) and a = 767.0(1) pm, c = 786.1(2) pm (RbSbF6). The structures exibit nearly ideal [MF6]- octahedra, the alkaline cations are coordinated by 12 fluorine ions in a distorted cuboctahedral geometry. Cations and complex anions form a slightly distorted CsCl arrangement. On heating, the arsenates transform to a NaCl arrangement with disordered [AsF6] ions, whereas the antimonates of Rb and Cs form the corresponding disordered CsCl type at higher temperatures. The phase transitions and the i. r. and Raman spectra as well as the structural relations to the remaining hexafluoropnictates AI[MVF6] are discussed.

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.

The [ICNI]+ cation: A combined experimental and theoretical study. Reaction of [ICNI]+[AsF6]- with CsN3

(Iodocyano)iodine hexafluoroarsenate, [ICNI]+[AsF6]-, containing the linear 22-valence-electron [ICNI]+ cation was synthesized either by the reaction of iodine cyanide with [I3]+[AsF6]- or directly from ICN, I2 and AsF5 and characterized by chemical analysis, IR, Raman and 19F NMR data. A combined vibrational (IR, Raman) and theoretical study revealed the [ICNI]+ cation to be linear, the preference of the linear over the bent structure can easily be understood in terms of hyperconjugative interactions in the cationic species [natural bond order (NBO) analysis]. The molecular structure of the [ICNI]+ cation was computed semiempirically (Austin Model 1, AMI; reparameterization of AM1, PM3) and ab initio at the Hartree-Fock (HF/6-31G*) and correlated RMP2 (RMP, restricted Moller-Plesset) and RMP4(SDQ) levels of theory using quasi-relativistic pseudo-potentials (LANL2DZ) for the icdine atoms. The computed structural parameters at the highest level applied are: Cx, symmetry, RMP4(SDQ), d(I-C) = 2.001, d(C≡N) = 1.167, d/(N-I) = 2.021 A. The N-I bond dissociation enthalpy for [ICN-I]+ was calculated ab initio at the electron-correlated RMP2 level of theory as 207.4 kJ mol-1. The metathetical reaction of [ICNI]+[AsF6]- with CsN3 in SO2ClF afforded IN3, Cs+[AsF6]- and ICN.

Halogen-facilitated Preparation of S4(AsF6)2*xSO2 (x a Convenient Synthesis of Se4(AsF6)2 and Se4(Sb2F11)2

Sulfur reacted with an excess of AsF5 at room temperature in the presence of a trace amount of halogen (X2 = Cl2, Br2 or I2) or AsCl4AsF6 in SO2 to give S4(AsF6)2*xSO2 (x a few minutes.A similar, but slower, reaction with SbF5 in SO2 or AsF3 at room temperature gave quantitative yields of S4(Sb2F11)2.The vibrational spectra of these salts with tentative assignments are reported.The corresponding preparations of Se4(AsF6)2 and Se4(Sb2F11)2 are also greatly facilitated by the presence of traces of halogen.Reactions of sulfur (or selenium) with SbF5 with and without traces of X2 in SO2 designed to give M4(SbF6)2 (M = S or Se) gave products that contained M42+, an unidentified SbV fluoroanion and some SbIII-containing species.A comnparative study was made on the effect of solvent, oxidising agent and facilitating reagent on the course of reaction.Possible reaction pathways for oxidation of sulfur (or selenium) by AsF5 (or SbF5) with and without the addition of traces of X2 or AsCl4AsF6 have been proposed.

Preparation and X-Ray Crystal Structure of (S3N2)2NAsF6, containing the Bis(thiodithiazyl)aminylium(1+) Cation

Crystalline (S3N2)2NAsF6 was prepared in ca. 60percent yield from a 1:1 mixture of S4N4 and S2NAsF6 in liquid SO2 at 0 deg C, and its structure determined by X-ray crystallography.The compound crystallises in the monoclinic space group C2/c with unit-cell dimensions a = 17.343(6), b = 17.103(6),c = 16.737(9) Angstroem, β = 98.29(3), and Z = 16.The stucture was solved by direct methods and refined by least-squares techniques to a final R of 0.11 for 2 308 observed reflections. (S3N2)2NAsF6 is essentially ionic with sulfur-fluorine cation-anion contacts.The (S3N2)2N+ cation is the first example of a monobridged bicyclic sulphur-nitrogen cation, and consists of two thiodithiazyl (S3N2) groups connected together by a bridging nitrogen atom attached to a sulphur atom of each S3N2 ring.The S3N2 rings are cis with respect to the bridging nitrogen atom, and are essentially eclipsed with respect to the SNS bridge. (S3N2)2NAsF6 reacts with CsN3 in liquid SO2 solution yielding impure poly(sulphur nitride) and CsAsF6.Solutions of (S3N2)2NAsF6 in liquid SO2 slowly disproportionate to S4N3AsF6 and S4N4.The i.r. spectrum of (S3N2)2NAsF6 is also reported.

The Reaction of S2NAsF6 with Halogens: Preparation and X-Ray Crystal Structure of Bis(difluorothio)nitronium Hexafluoroarsenate(V), (SF2)2NAsF6; Preparation of (SBr)2NAsF6, and Vibrational Spectrum and Normal-co-ordinate Analysis of the (SX)2N+ (X=Cl or Br) Cations

Solutions of S2NAsF6 in liquid SO2 react with elemental chlorine and bromine yielding (SX)2NAsF6 (X=Cl or Br), essentially quantitatively.No reaction was detected with iodine.The vibrational spectrum of (SBr)2N+ was similar to that of (SCl)2N+ of known structure, implying a similar structure for the bromine derivative.This conclusion was supported by a normal-co-ordinate analysis of (SX)2N+.The analysis was consistent with some positive interaction between the halogen atoms in (SX)2N+, possibly accounting for the cis planar geometry of these cations.Attempts to prepare (SF)2NAsF6 were unsuccessful.However, (SF2)2NAsF6 was synthesised by the reaction of S2NAsF6 and XeF2 in liquid SO2F2, essentially quantitatively.The structure of (SF2)2NAsF6 was determined by X-ray diffraction.The crystals are orthorhombic with a=14.909(1), b=9.843(4), c=12.113(1) Angstroem, and Z=8.The structure was refined in space group Pbca to a conventional R factor of 0.076 for 902 independent reflections with I>2?(I).It consists of discrete (SF2)2N+ and AsF6- with some cation-anion interactions.The (SF2)2N+ cation has approximate C2γ symmetry with essentially eclipsed fluorine-sulphur bonds as viewed along the sulphur-sulphur axis.The average S-N and S-F distances are 1.551(10) and 1.523(8) Angstroem, and the average FSF and FSN bond angles are 94.0(5) and 100.2(6) deg.The SNS bond angle is 121.1(6) deg.The vibrational spectrum of (SF2)2NAsF6 is reported.