Preparation and Structural and Magnetic Properties of AgF+MF6- (M = Ir, Ru, Sb, Bi) and Ag2+(BiF6-)2

Lucier, G.; Muenzenberg, J.; Casteel, William J.; Bartlett, Neil

doi:10.1021/ic00114a030

Cited by 44 publications

(55 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The structure can be described in terms of one-dimensional infinite 6 . [12] In this case, the AgÀF distances are: four at 2.00-2.16 and two others at 2.51 and 2.66 . On the other hand a flattened pentagonal bipyramid has been found for AgFMF 6 with M = As, Ir, Au.…”

Section: Introductionmentioning

confidence: 87%

“…On the other hand a flattened pentagonal bipyramid has been found for AgFMF 6 with M = As, Ir, Au. [10,11,12] For instance, in AgFAsF 6 the distances are the following: two AgÀF at 2.00 and five AgÀF in the 2.39-2.44 range. The resulting near-to-linear coordination is alternatively attributable to the occupancy of the d z 2 orbital by the unpaired electron.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Mazej

Arčon

Benkič

et al. 2004

Chemistry A European J

View full text Add to dashboard Cite

Crystal structures and magnetic investigations of CuFAsF6 and CsCuAlF6 are reported. Together with KCuAlF6, these appear to be the only examples of Jahn-Teller pure Cu(II) compounds containing only one type of ligand that exhibits a compressed octahedral coordination geometry. The Rietveld method has been used for refining the CsCuAlF6 structure based on neutron powder diffraction data at 4 K. The compound crystallizes in space group Pnma (no. 62) with a=7.055(1), b=7.112(1), c=10.153(1) A and Z=4 at 4 K. The structure is built from infinite [CuF5]n(3n-) chains of [CuF6]4- octahedra running along the [1 0 0] direction and (AlF6)3- octahedra connected by corners in the trans position, thus giving rise to chains oriented along the [0 1 0] direction. Single crystals of CuFAsF6 were prepared under solvothermal conditions in AsF5 above its critical temperature. The structure was determined from single-crystal data. CuFAsF6 crystallises in the orthorhombic space group Imma (No. 74) with a=10.732(5), b=6.941(3), c=6.814(3) A and Z=4 at 200 K. The structure can also be described in terms of one-dimensional infinite [CuF5]n(3n-) chains of tilted [CuF6](4-) octahedra linked by trans-vertices running along the b axis. The [CuF5]n(3n-) chains are connected through [AsF6]- units sharing joint vertices. The compressed octahedral coordination of CuII atoms in CuFAsF6 and CsCuAlF6 compounds at room temperature is confirmed by Cu K-edge EXAFS (extended x-ray absorption fine structure) analysis. For both compounds strong antiferromagnetic interactions within the [CuF5]n(3n-) chains were observed (theta(p)=-290+/-10 K and theta(p)=-390+/-10 K for CuFAsF6 and CsCuAlF6, respectively). The peculiar magnetic behaviour of chain compounds containing divalent copper at low temperature could be related to uncompensated magnetic moments in the one-dimensional network.

show abstract

Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Mazej

Arčon

Benkič

et al. 2004

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Even the XϪray powder pattern of the phase close to a ''PdFAsF 6 '' composition was the same as that of Pd(AsF 6 ) 2 . We also tried to prepare PdFAsF 6 by displacing a weak acid from its alkali metal salt, similar to that reported for AgFBiF 6 from Ag(BiF 6 ) 2 [17] but, instead of PdFAsF 6 , a mixture of Pd(AsF 6 ) 2 and a low-temperature modification of PdF 2 [9] was always obtained [Equation (8)]. (8) On the basis of these results we conclude that phases with compositions PdF x (AsF 6 ) 2Ϫx (0 Ͻ x Յ 1) are mixtures of Pd(AsF 6 ) 2 and PdF 2 and not mixtures of Pd(AsF 6 ) 2 and PdFAsF 6 .…”

Section: Synthesesmentioning

confidence: 96%

“…Mn(SbF 6 ) 2, [19] Ag(XF 6 ) 2 , X ϭ Sb, [20] Nb, [21] Ta, [21] Bi, [17] Au(SbF 6 ) 2 . [5] Pertinent crystallographic data are given in Exp.…”

Section: Crystal Structure Of Pd(asf 6 )mentioning

confidence: 99%

Palladium Chemistry in Anhydrous HF/AsF₅ Superacid Medium

et al. 2004

View full text Add to dashboard Cite

Pd metal dissolves in anhydrous HF (aHF) acidified with AsF5 in the presence of F2 at ≈︁298 K to give a blue‐green solution from which green Pd(AsF6)2 can be isolated. The latter was also prepared by the interaction of PdF2 and AsF5 in aHF or by the reaction between PdO and F2 in aHF acidified with AsF5. Powdered Pd(AsF6)2 slowly loses AsF5 in a dynamic vacuum. It can therefore be isolated from solution at T < 253 K. Single‐crystals of Pd(AsF6)2 were prepared by solvothermal synthesis from a Pd/AsF5/F2/aHF mixture at 393 K. Pd(AsF6)2 is triclinic with a = 500.9(5), b = 538.3(5), c = 864.9(9) pm, α = 74.46(3), β = 89.97(4), γ = 62.47(2)°, V = 0.1972(3) nm3, and Z = 1, space group P$\bar 1$ (No. 2). The six‐coordinate Pd atoms (coordinated with fluorine) are well separated by isolated AsF6 units. In the 2−175 K temperature range Pd(AsF6)2 follows the Curie−Weiss law with μeff = 3.53 B.M., Tn = 8 K and θp= −13 K. Because of cation‐anion interactions, the AsF6− anions deviate from ideal Oh symmetry. The reduced symmetry can be seen in vibrational spectra, where splitting of the anion vibrational modes can be observed. The oxidation of Pd metal or PdO with F2 in neutral aHF yielded Pd2F6. No reaction was observed between Pd, PdO or Pd2F6 and AsF5 in aHF. All attempts to prepare PdFAsF6 were unsuccessful. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

show abstract

“…[34] They belong to five principal types: a) Ag II [MF 4 À ] 2 , M Ag, [16] Au; [19,35] b) Ag II [MF 6 À ] 2 , M Bi, [28] Sb, [36,37] Ru/Bi, [28] Nb, [38] Ta; [38] c) Ag II [MF 6 2À ], M Ge, [39] Sn, [18,39,40] Pb, [39,40] Ti, [18,39] Zr, [39,40] Hf, [39] Rh, [39] Pd, [18,39,41] Pt, [18,39,41] Mn [42] Cr [43] d) Ag 3 M 2 F 14 , M Hf, [44] Zr [44] e) K 3 Ag 2 M 4 F 23 , M Hf, [45] Zr. [45] In addition, isolated Ag II centers occurs in NaAgZr 2 F 11 , the only known member of a M I Ag II Zr 2 F 11 series.…”

Section: Structures Containing Magnetically Isolated Ag II Centersmentioning

confidence: 99%

Real and Hypothetical Intermediate-Valence AgII/AgIII and AgII/AgI Fluoride Systems as Potential Superconductors

Grochala¹,

Hoffmann²

2001

Angew. Chem. Int. Ed.

159

168

View full text Add to dashboard Cite

Preparation and Structural and Magnetic Properties of AgF+MF6- (M = Ir, Ru, Sb, Bi) and Ag2+(BiF6-)2

Cited by 44 publications

References 0 publications

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Palladium Chemistry in Anhydrous HF/AsF₅ Superacid Medium

Real and Hypothetical Intermediate-Valence AgII/AgIII and AgII/AgI Fluoride Systems as Potential Superconductors

Contact Info

Product

Resources

About

Preparation and Structural and Magnetic Properties of AgF+MF6- (M = Ir, Ru, Sb, Bi) and Ag2+(BiF6-)2

Cited by 44 publications

References 0 publications

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF6 and CsCuAlF6

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF6 and CsCuAlF6

Palladium Chemistry in Anhydrous HF/AsF5 Superacid Medium

Real and Hypothetical Intermediate-Valence AgII/AgIII and AgII/AgI Fluoride Systems as Potential Superconductors

Contact Info

Product

Resources

About

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Compressed Octahedral Coordination in Chain Compounds Containing Divalent Copper: Structure and Magnetic Properties of CuFAsF₆ and CsCuAlF₆

Palladium Chemistry in Anhydrous HF/AsF₅ Superacid Medium