13709-36-9Relevant academic research and scientific papers
Synthesis of water and molecular oxygen highly enriched in 17O and 18O isotopes from carbon oxides
Artyukhov,Kravets,Artyukhov,Babichev,Ryzhkov
, p. 335 - 337 (2011)
The reaction of carbon oxides and hydrogen in the presence of the Raney nickel catalyst has been used for water synthesis. A procedure has been developed for the recovery and collection of the synthesized water with minimal losses and without deteriorating the 17O or 18O isotope enrichment as compared to the initial CO2 and CO. The recovery of oxygen with high concentrations of 17O and 18O isotopes is based on the reaction of xenon difluoride with water. The yield based on oxygen achieves 99% without reduction of isotope enrichment, which is confirmed by mass-spectral measurements of oxygen isotope concentrations in the initial reagents and final reaction products. Pleiades Publishing, Ltd., 2011.
Largest perfluorometallate [Ti10F45]5- oligomer and polymeric ([Ti3F13]-)∞ and ([TiF5]-)∞ anions prepared as [XeF5]+ salts
Mazej, Zoran,Goreshnik, Evgeny A.
, p. 7320 - 7325 (2016)
Reactions between XeF2, TiF4 and UV-irradiated elemental F2 in anhydrous HF yielded XeF5TiF5 (XeF6·TiF4), [XeF5]5[Ti10F45] (XeF6·2TiF4), and [XeF5][Ti3F13] (XeF6·3TiF4) upon crystallization. [XeF5]5[Ti10F45] crystallizes in two crystal modifications at low (α-phase, 150 K) and ambient (β-phase, 296 K) temperatures. The crystal structure determination of [XeF5]5[Ti10F45] reveals the largest known discrete decameric [Ti10F45]5- anion built from ten TiF6 octahedra, sharing vertices, in the shape of a double-star. [XeF5]+ cations are completely ordered in the α-phase, while one of three crystallographically unique [XeF5]+ cations is two-fold disordered in the β-phase. The anionic part of [XeF5][Ti3F13] is built from tetrameric Ti4F20 and octameric Ti8F36 units sharing vertices and alternatively linked into ([Ti3F13]-)∞ columns. The charge balance is maintained by [XeF5]+ cations which form secondary Xe?F contacts with fluorine atoms of ([Ti3F13]-)∞ groups. The main structural feature of XeF5TiF5 is an infinite chain of distorted TiF6 octahedra joined by cis vertices.
Synthesis, raman spectra and crystal structures of [Cu(XeF 2)n](SbF6)2 (n = 2, 4)
Mazej, Zoran,Goreshnik, Evgeny
, p. 4209 - 4214 (2008)
Pure [Cu(XeF2)2](SbF6)2 was prepared by the reaction of Cu(SbF6)2 with a stoichiometric amount of XeF2 in anhydrous hydrogen fluoride (aHF) at ambient temperature. The reaction between Cu(SbF6)2 and XeF2 (1:4 molar ratio) in aHF yielded [Cu(XeF2) 4](SbF6)2 contaminated with traces of Xe 2F3SbF6 and CuF2. The 6-fold coordination of Cu2+ in [Cu(XeF2)2](SbF 6)2 includes two fluorine atoms from two XeF2 ligands and four fluorine atoms provided by four [SbF6]- anions. The neighboring [Cu(XeF2)2]2+ moieties are connected via two [SbF6] units, with the bridging fluorine atoms in cis positions, into infinite -[Cu(η1-XeF2) 2]-(cis-η2-SbF6)2- [Cu(η1-XeF2)2]- chains. Because of the high electron affinity of Cu2+, coordinated XeF2 shows the highest distortion (Xe-Fb = 210.2(5) pm, Xe-Ft = 190.6(5) pm) observed so far among all known [Mx+(XeF2) n](A)x (A = BF4, PF6, etc.) complexes. The four equatorial coordination sites of the Cu2+ ion in [Cu(XeF2)4](SbF6)2 are occupied by four XeF2 ligands. Two fluorine atoms belonging to two [SbF 6] units complete the Cu2+ coordination environment. The neighboring [Cu(XeF2)4]2+ species are linked via one [SbF6] unit, with bridging fluorine atoms in trans positions, into linear infinite -[Cu(η1-XeF2) 4]-(trans-η2-SbF6)-[Cu(η1- XeF2)4]- chains. To compensate for the remaining positive charge, crystallographically independent [SbF6]- anions are located between the chains and are fixed in the crystal space by weak Xe...F(Sb) interactions.
New Coordination Compounds of Cd(AsF6)2 with HF and XeF2
Tavcar, Gasper,Benkic, Primoz,Zemva, Boris
, p. 1452 - 1457 (2004)
Two new coordination compounds of cadmium with HF and XeF2 as ligands have been synthesized. Solid white [Cd(HF)](AsF6) 2 is obtained from an anhydrous HF (aHF) solution of Cd(AsF 6)2. It crystallizes in a monoclinic P21/c space group with a = 9.4687(14) A, b = 9.2724(11) A, c = 10.5503(18) A, β = 104.887(7)°, and Z = 4. The coordination sphere of Cd consists of 7 + 2 fluorine atoms, which are in a capped trigonal-prismatic arrangement. The reaction between Cd(AsF6)2 and XeF 2 in aHF yields a solid white product at room temperature having the composition [Cd(XeF2)4](AsF6)2 after the excess XeF2 and solvent have been removed under dynamic vacuum. [Cd(XeF2)4](AsF6)2 crystallizes in the orthorhombic space group P21212 1, with a = 8.6482(6) A, b = 13.5555(11) A, c = 16.6312(14) A, and Z = 4. The coordination sphere of Cd consists of eight fluorine atoms, which are at the corners of a trigonal prism with two capped side faces.
Chemical and physical properties of some xenon compounds
Huston, John L.
, p. 685 - 688 (1982)
Useful preparative reactions for several xenon compounds can be systematized as acid-base chemistry. The hydrolysis of XeF4 and ammonolysis of XeF6 have been investigated. The melting point of XeO4 and the melting point an
Synthesis and characterisation of [XeF5]3[Ti 4F19] containing a discrete [Ti4F 19]3- anion
Mazej, Zoran,Goreshnik, Evgeny
, p. 4503 - 4506 (2009)
The complex [XeF5]3[Ti4F19] was prepared by reaction of XeF2, TiF4 and UV-irradiated elemental fluorine in anhydrous hydrogen fluoride as the solvent. The crystal structure of [XeF5/s
[Mg(XeF2)n](AsF6)2 (n = 4, 2): First Compounds of Magnesium with XeF2
Tramsek, Melita,Benkic, Primoz,Zemva, Boris
, p. 699 - 703 (2004)
The reaction between Mg(AsF6)2 and XeF2 in anhydrous HF (aHF) at room temperature yields two compounds with XeF 2 bonded directly to the Mg2+ cation: [Mg(XeF 2)4](AsF6)2; [Mg(XeF 2)2](AsF6)2. The 1:4 compound is obtained with excess XeF2 while the 1:2 compound is prepared from stoichiometric amounts of Mg(AsF6)2 and XeF2. [Mg(XeF2)4](AsF6)2 crystallizes in an orthorhombic crystal system, space group P21212 1, with a = 8.698(15) A, b = 14.517(15) A, c = 15.344(16) A, V = 1937(4) A3, and Z = 4. The octahedral coordination sphere of Mg consists of one fluorine atom from each of the four XeF2 molecules and two fluorine atoms from the two AsF6 units. [Mg(XeF2)2](AsF6)2 crystallizes in the orthorhombic crystal system, space group Pbam, with a = 8.9767(10) A, b = 15.1687(18) A, c = 5.3202(6) A, V = 724.42(14) A, and Z = 2. The octahedral coordination sphere consists of two fluorine atoms, one from each of the two XeF2 molecules and four fluorine atoms from the four bridging AsF6 units.
X-ray crystal structures of [XeF][MF6] (M = As, Sb, Bi), [XeF][M2F11] (M = Sb, Bi) and estimated thermochemical data and predicted stabilities for noble-gas fluorocation salts using volume-based thermodynamics
Elliott, Hugh St. A.,Lehmann, John F.,Mercier, Helene P.A.,Jenkins, H. Donald Brooke,Schrobilgen, Gary J.
, p. 8504 - 8523 (2010)
The crystal structures of the xenon(II) salts, [XeF][SbF6], [XeF][BiF6], and [XeF][Bi2F11], have been determined for the first time, and those of XeF2, [XeF][AsF 6], [XeF][Sb2F11], and [XeF3] [Sb2F11] have been redetermined with greater precision at -173 °C. The Bi2F11- anion, which has a structure analogous to those of the As2F11- and Sb2F11- anions, has been structurally characterized by single crystal X-ray diffraction for the first time as its XeF+ salt. The fluorine bridge between the bismuth atoms is asymmetric with Bi...Fb bond lengths of 2.092(6) and 2.195(6) A and a Bi...Fb′...Bi bridge bond angle of 145.3(3)o. The XeF+ cations interact with their anions by means of Xe...Fb...M bridges. Consequently, the solid-state Raman spectra of [XeF][MF6] (M = As, Sb, Bi) were modeled as the gas-phase ion pairs and assigned with the aid of quantum-chemical calculations. Relationships among the terminal Xe-Ft and bridge Xe...F b bond lengths and stretching frequencies and the gas-phase fluoride ion affinities of the parent Lewis acid that the anion is derived from are considered. The analogous krypton ion pairs, [KrF][MF6] (M = As, Sb, Bi) were also calculated and compared with their previously published X-ray crystal structures. The calculated cation-anion charge separations indicate that the [XeF][MF6] salts are more ionic than their krypton analogues and that XeF2 is a stronger fluoride ion donor than KrF2. The lattice energies, standard enthalpies, and free energies of formation for salts containing the NgF+, Ng2F3+, XeF3+, XeF5+, Xe2F 11+, and XeOF3+ (Ng = Ar, Kr, Xe) cations were estimated using volume-based thermodynamics (VBT) based on crystallographic and estimated ion volumes. These estimated parameters were then used to predict the stabilities of noble-gas salts. VBT is used to examine and predict the stabilities of, inter alia, the salts [XeFm][Sb nF5n+1] and [XeFm][AsnF 5n+1] (m = 1, 3; n = 1, 2). VBT also confirms that XeF+ salts are stable toward redox decomposition to Ng, F2, and MF 5 (M = As, Sb), whereas the isolable krypton compounds and the unknown ArF+ salts are predicted to be unstable by VBT with the ArF+ salts being the least stable.
Single-crystal structure determination of NO2SbF6, XeF5SbF6 and XeF5Sb2F11
Mazej, Zoran,Goreshnik, Evgeny A.
, p. 47 - 50 (2015)
NO2SbF6 crystalizes at 150 K in the orthorhombic Cmmm space group (No. 65) with a = 6.8119(7) ?, b = 7.3517(7) ?, c = 5.5665(5) ?, V = 278.77(5) ?3, and Z = 2. Its crystal structure exhibits a different packing of the [NO2]+ and [SbF6]- ions than in the known crystal structure of NO2AsF6. The XeF5SbF6 compound is orthorhombic at 150 K, space group Pnma (No. 62), with a = 16.7159(6) ?, b = 8.1093(3) ?, c = 5.7576(2) ?, V = 780.47(5) ?3, Z = 4, and it is isotypic with the known XeF5MF6 crystal structures of M = Nb, Ru, and Pt. The unit cell of XeF5Sb2F11 is triclinic at 200 K, P1ˉ space group (No. 2), with a = 8.5223(8) ?, b = 8.5582(8) ?, c = 9.2012(8) ?, α = 68.799(8)°, β = 74.897(8)°, γ = 76.252(8)°, V = 596.35(10) ?3 and Z = 2. Each [XeF5]+ cation has four interactions with the three [Sb2F11]- anions.
Metal(II) hexafluorophosphates(V) (M = Sr, Pb) containing XeF 2-coordinated metal ions [M(XeF2)3](PF 6)2, [Pb3(XeF2)11] (PF6)6, and [Sr3(XeF2) 10](PF6)6
Bunic, Tina,Tramsek, Melita,Goreshnik, Evgeny,Tavcar, Gasper,Zemva, Boris
, p. 5276 - 5282 (2007)
From the system MF2/PF5/XeF2/anhydrous hydrogen fluoride (aHF), four compounds [Sr(XeF2)3] (PF6)2, [Pb(XeF2)3]-(PF 6)2, [Sr3(XeF2)10](PF6)6, and [Pb3(XeF2)11](PF6)6 were isolated and characterized by Raman spectroscopy and X-ray single-crystal diffraction. The [M(XeF2)3](PF6)2 (M = Sr, Pb) compounds are isostructural with the previously reported [Sr(XeF 2)3](AsF6)2. The structure of [Sr3(XeF2)10](PF6)6 (space group C2/c, a = 11.778(6) A, b = 12.497-(6) A, c = 34.60(2) A, β = 95.574(4)°, V = 5069(4) A3, Z = 4) contains two crystallographically independent metal centers with a coordination number of 10 and rather unusual coordination spheres in the shape of tetracapped trigonal prisms. The bridging XeF2 molecules and one bridging PF6- anion, which connect the metal centers, form complicated 3D structures. The structure of [Pb3(XeF 2)11](PF6)6 (space group C2/m; a = 13.01(3) A, b = 11.437(4) A, c = 18.487(7) A, β = 104.374(9)°, V = 2665(6) A3, Z = 2) consists of a 3D network of the general formula {[Pb3(XeF2) 10](PF6)6}n and a noncoordinated XeF2 molecule fixed in the crystal structure only by weak electrostatic interactions. This structure also contains two crystallographically independent Pb atoms. One of them possesses a unique homoleptic environment built up by eight F atoms from eight XeF2 molecules in the shape of a cube, whereas the second Pb atom with a coordination number of 9 adopts the shape of a tricapped trigonal prism common for lead compounds. [Pb3(XeF2)11](PF6) 6 and [Sr3(XeF2)10](PF 6)6 are formed when an excess of XeF2 is used during the process of the crystallization of [M(XeF2) 3](PF6)2 from their aHF solutions.
