Das magnetische Verhalten von AgF2

Gruner, Erhard; Klemm, Wilhelm

doi:10.1007/bf01492366

Cited by 30 publications

(3 citation statements)

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“…AgF2, on the contrary, exhibits a value about one third of that expected for a magnetically dilute compound. The actual value is 440 X 10-6 emu./g.-ion at room temperature (70). Exchange effects occur in this compound giving rise to ferromagnetism (70) below a well defined Curie point of -110°.…”

Section: Magnetic Propertiesmentioning

confidence: 91%

Higher Oxidation States of Silver.

McMillan¹

1962

Chem. Rev.

198

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Section: Magnetic Propertiesmentioning

confidence: 91%

Higher Oxidation States of Silver.

McMillan¹

1962

Chem. Rev.

198

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“…The details that follow are for a preparation which gave Ag I Ag III F4, the XRDP of which revealed only AgBF4 contamination and no Ag II F2. SQUID measurements did exhibit a weak paramagnetism (shown in Figure 1) indicative of contamination by a trace of a weakly paramagnetic impurity, but this was not Ag II F2, since this is revealed by its characteristic field dependence 17 below 163 K. The very low values of χg suggest that the bulk of the material is diamagnetic. One arm of a T-reactor was loaded with KAgF4 (111.3 mg, 0.499 mmol) and AgBF4 (89.8 mg, 0.461 mmol), aHF (1.5 mL) was added, and the mixture was brought from -81 to +10 °C over ∼24 h, with constant agitation.…”

Section: Methodsmentioning

confidence: 98%

Disproportionation of Ag(II) to Ag(I) and Ag(III) in Fluoride Systems and Syntheses and Structures of (AgF⁺)₂AgF₄^-MF₆^- Salts (M = As, Sb, Pt, Au, Ru)

et al. 1999

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Interaction of Ag(+) salts in anhydrous liquid hydrogen fluoride, aHF, with AgF(4)(-) salts gives amorphous red-brown diamagnetic Ag(I)Ag(III)F(4), which transforms exothermally to brown, paramagnetic, microcrystalline Ag(II)F(2) below 0 degrees C. Ag(I)Au(III)F(4) prepared from Ag(+) and AuF(4)(-) in aHF has a tetragonal unit cell and a KBrF(4) type lattice, with a = 5.788(1) Å, c = 10.806(2) Å, and Z = 4. Blue-green Ag(II)FAsF(6) disproportionates in aHF (in the absence of F(-) acceptors) to colorless Ag(I)AsF(6) and a black pseudotrifluoride, (Ag(II)F(+))(2)Ag(III)F(4)(-)AsF(6)(-). The latter and other (AgF)(2)AgF(4)MF(6) salts are also generated by oxidation of AgF(2) or AgF(+) salts in aHF with F(2) or in solutions of O(2)(+)MF(6)(-) salts (M = As, Sb, Pt, Au, Ru). Single crystals of (AgF)(2)AgF(4)AsF(6) were grown from an AgFAsF(6)/AsF(5) solution in aHF standing over AgF(2) or AgFBF(4), with F(2) as the oxidant. They are monoclinic, P2/c, at 20 degrees C, with a = 5.6045(6) Å, b = 5.2567(6) Å, c = 7.8061(8) Å, beta = 96.594(9) degrees, and Z = 1. The structure consists of (AgF)(n)()(n)()(+) chains (F-Ag-F = 180 degrees, Ag-F-Ag = 153.9(11) degrees, Ag-F = 2.003(4) Å), parallel to c, that enclose stacks of alternating AgF(4)(-) and AsF(6)(-), 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)(2)AgF(4)AsF(6) [like other (AgF)(n)()(n)()(+) salts] is a temperature-independent paramagnet except for a Curie "tail" below 50 K.

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“…[(Allgll/g)2 cos 2 8 + (AJ.g.l/g)2 sin 2 8]iMI(4) g= (g112 cos 2 8+g.l 2 sin 2 8)!. [(Allgll/g)2 cos 2 8 + (AJ.g.l/g)2 sin 2 8]iMI(4) g= (g112 cos 2 8+g.l 2 sin 2 8)!.…”

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Paramagnetic Resonance of Some Silver (II) Compounds

McMillan

Smaller

1961

The Journal of Chemical Physics

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Electron paramagnetic resonance field-modulation eddy-current analysis of silver-plated graphite resonators Rev. Sci. Instrum. 76, 094702 (2005);The electron paramagnetic resonance of acidic solutions of silver (n) and several silver (n) solid complex compounds has been investigated. In all cases a strong g anistropy permitted the evaluation of the principal g values. In two cases, the hyperfine splitting could be measured without ambiguity. Parallel measurements of the optical and ultraviolet absorption in the case of silver (n) solutions indicated that the hole is not localized on the paramagnetic ion.

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Das magnetische Verhalten von AgF2

Cited by 30 publications

References 1 publication

Higher Oxidation States of Silver.

Higher Oxidation States of Silver.

Disproportionation of Ag(II) to Ag(I) and Ag(III) in Fluoride Systems and Syntheses and Structures of (AgF⁺)₂AgF₄^-MF₆^- Salts (M = As, Sb, Pt, Au, Ru)

Paramagnetic Resonance of Some Silver (II) Compounds

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Das magnetische Verhalten von AgF2

Cited by 30 publications

References 1 publication

Higher Oxidation States of Silver.

Higher Oxidation States of Silver.

Disproportionation of Ag(II) to Ag(I) and Ag(III) in Fluoride Systems and Syntheses and Structures of (AgF+)2AgF4-MF6- Salts (M = As, Sb, Pt, Au, Ru)

Paramagnetic Resonance of Some Silver (II) Compounds

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Disproportionation of Ag(II) to Ag(I) and Ag(III) in Fluoride Systems and Syntheses and Structures of (AgF⁺)₂AgF₄^-MF₆^- Salts (M = As, Sb, Pt, Au, Ru)