12005-82-2Relevant articles and documents
Disproportionation of Ag(II) to Ag(I) and Ag(III) in fluoride systems and syntheses and structures of (AgF+)2AgF4-MFe6 - salts (M = As, Sb, Pt, Au, Ru)
Shen, Ciping,Z?emva, Boris,Lucier, George M.,Graudejus, Oliver,Allman, John A.,Bartlett, Neil
, p. 4570 - 4577 (1999)
Interaction of Ag+ salts in anhydrous liquid hydrogen fluoride, aHF, with AgF4- salts gives amorphous red-brown diamagnetic AgIAgIIIF4, which transforms exothermally to brown, paramagnetic, microcrystalline AgIIF2 below 0°C. AgIAuIIIF4 prepared from Ag+ and AuF4- in aHF has a tetragonal unit cell and a KBrF4 type lattice, with a = 5.788(1) A?, c = 10.806(2) A?, and Z = 4. Blue-green AgIIFAsF6 disproportionates in aHF (in the absence of F- acceptors) to colorless AgIAsF6 and a black pseudotrifluoride, (AgIIF+)2AgIIIF4 -AsF6-. The latter and other (AgF)2AgF4MF6 salts are also generated by oxidation of AgF2 or AgF+ salts in aHF with F2 or in solutions of O2+MF6- salts (M = As, Sb, Pt, Au, Ru). Single crystals of (AgF)2AgF4AsF6 were grown from an AgFAsF6/AsF5 solution in aHF standing over AgF2 or AgFBF4, with F2 as the oxidant. They are monoclinic, P2/c, at 20°C, with a = 5.6045(6) A?, b = 5.2567(6) A?, c = 7.8061(8) A?, β = 96.594(9)°, and Z = 1. The structure consists of (AgF)nn+ chains (F-Ag-F = 180°, Ag-F-Ag = 153.9(11)°, Ag-F = 2.003(4) A?), parallel to c, that enclose stacks of alternating AgF4- and AsF6-, each anion making bridging contact with four Ag(II) cations of the four surrounding chains caging them. There is no registry between the ordered array in one cage and that in any neighboring cage . The F-ligand anion bridges between the anions and, with the Ag(II) of the chains, generates a trifluoride-like structure. (AgF)2AgF4AsF6 [like other (AgF)nn+ salts] is a temperature-independent paramagnet except for a Curie tail below 50 K.
Preparation and structural and magnetic properties of AgF+MF6- (M = Ir, Ru, Sb, Bi) and Ag2+(BiF6-)2
Lucier,Münzenberg,Casteel Jr.,Bartlett
, p. 2692 - 2698 (2008/10/08)
AgFMF6 salts (M = Ir, Ru, Sb, Bi) have been prepared by the action of elemental F2 in AHF on AgMF6, and for AgFBiF6, also by interaction of Ag(BiF6)2 with KBF4 or KPF6 in AHF. Three structure types have been identified. AgFIrF6 {orthorhombic Pnma, a = 7.628(2) ?, b = 7.067(2) ?, c = 10.253(4) ?, V = 552.7(3) ?3, and Z = 4, with R = 0.026 and Rw = 0.030 for 531 observed reflections and 50 parameters refined by full-matrix least squares, Mo Kα radiation at 298 K} is isostructural with AgFAsF6 and AgFAuF6, the one dimensional cation (Ag-F)nn+, showing Ag(II) linearly coordinated to two F ligands with Ag-F = 1.977(9) and 2.014(9) ? and Ag-F-Ag = 146.0(5)°. In AgFRuF6 {monoclinic P21/n, a = 8.3432(13) ?, b = 5.4933(8) ?, c = 11.9286(22) ?, β = 108.36(1)°, V = 518.9(3) ?3, and Z = 4, with R = 0.027 and Rw = 0.028 for 1511 observed reflections and 83 parameters refined by full matrix least squares, Mo Kα radiation at 298 K} the Ag(II) is nearly square coordinated by four F; two cis F, each shared nearly equally with another Ag(II) {Ag-F = 2.007(3) and 2.018(2) A, Ag-F-Ag = 155.9(2)°} give the cation a ribbonlike polymeric character. The other two F ligands of the square array {Ag-F = 2.140(3) and 2.158(3) ?} are each associated with a different RuF6-, each of which is so linked to two Ag(II) moieties. AgFMF6 (M = Sb, Bi) belong to a third structure type. The cation chains of the AgF+MF6- salts have approximate temperature independence of magnetic susceptibility, akin to that of metallic systems. In contrast, Ag(BiF6)2 {triclinic P1, a = 5.218(2) ?, b = 5.579(1) ?, c = 8.934(2) ?, α = 76.08(2)°, β = 88.93(2)°, γ = 65.08(2)°, V = 228.0(1) ?3, and Z = 1, with R = 0.055 and Rw = 0.067 for 1327 observed reflections and 41 parameters refined by full-matrix least squares, Mo Kα radiation at 298 K}, which is isostructural with Ag(SbF6)2, shows approximate obedience to the Curie-Weiss law. AgRuF6BiF6 appears to be similar. In the structure of Ag(BiF6)2, each Ag(II) is linked in nearly square array to four F ligands of four surrounding BiF6- ions {Ag-F = 2.096(9) ? × 2 and 2.122(9) ? × 2}, two other anions making contact normal to that plane, with Ag-F = 2.440(10) ?.
Spontaneous oxidation of xenon to Xe(II) by cationic Ag(II) in anhydrous hydrogen fluoride solutions
?emva, Boris,Hagiwara, Rika,Casteel Jr., William J.,Lutar, Karel,Jesih, Adolf,Bartlett, Neil
, p. 4846 - 4849 (2007/10/02)
Blue solutions, prepared by dissolving AgF2 in anhydrous hydrogen fluoride (AHF) with BF3 or AsF5, oxidize Xe, at ～20 °C, to produce nearly colorless solids. Overall reactions (all in AHF) are as follows: 2AgF2
Synthesis and characterisation of +- and 2+22-
Srivastava, P. C.
, p. 75 - 76 (2007/10/02)
Reaction of Ag+AsF6- with Te metal and Ph2Te2 in liquid SO2 yield + - and 2+ 22- respectively.The products have been characterised through elemental analyses, IR, Raman and 1H NMR spectroscopy.
