Notes. Preparation and characterization of the adduct UO 2 F 2 ·AsF 5

2001

Z. anorg. allg. Chem.

Mn(SbF 6 ) 2 was prepared from MnF 2 and SbF 5 in aHF (anhydrous HF) and single crystals were obtained from the respective solution. The compound crystallises in the triclinic space group P 1 (No. 2) with a = 517.3(2) pm, b = 554.9(2) pm, c = 888.2(2) pm, a = 73.98(3)°, b = 89.17(2)°, c = 62.54(2)°and Z = 1. MnGeF 6 was prepared from MnF 2 and GeF 4 in aHF and by metathetical reaction between solutions of K 2 GeF 6 in aHF and Mn(AsF 6 ) 2 in aHF. Attempt to isolate Mn(GeF 5 ) 2 prepared by metathetical reaction between solutions of XeF 5 GeF 5 in aHF and Mn(AsF 6 ) 2 in aHF failed, although some slight evidences for its existence were obtained. Vibrational data of MnGeF 6 are in agreement with lowering of the symmetry of GeF 6 2± from O h to C 3i because of the site symmetry effects.

Section: Syntheses Of Mngef 6 and Attempted Syntheses Of Mn(gef 5 )mentioning

confidence: 68%

Reactions of Manganese(II) Fluoride in the Superacidic Systems HF/SbF5 and HF/GeF4 - Crystal Structure of Mn(SbF6)2 and Vibrational Spectra of MnGeF6

Benkič

2001

Z. anorg. allg. Chem.

“…Reagents: Anhydrous HF (Linde AG, Pullach, Germany, 99.995 %) was treated with K 2 NiF 6 (Advance Research Chemicals, Inc.) for several hours prior to use. XeF 5 SbF 6 [3,4] and M(SbF 6 ) 2 (M = Mg, Mn, Co, Ni, Zn, Pd, Ca, Sr, Ba, Cr, Fe, Ag, Cd, Hg) [5,6] were synthesized as described previously.…”

Section: Methodsmentioning

confidence: 99%

“…In this paper, crystallizations of XeF 5 SbF 6 [3,4] and M(SbF 6 ) 2 (M = Mg, Ca, Sr, Ba, Cr, Mn, Fe, Co, Ni, Ag, Pd, Zn, Cd, Hg) [5,6]…”

Section: Introductionmentioning

confidence: 99%

Influence of the Increasing Size of the M²⁺ Cation on the Crystal Structures of XeF₅M(SbF₆)₃ (M = Ni, Mg, Cu, Zn, Co, Mn, Pd) and (XeF₅)₃[Hg(HF)]₂(SbF₆)₇

Goreshnik

2016

Eur J Inorg Chem

The reactions between XeF5SbF6 and M(SbF6)2 (M2+ = Ni, Mg, Zn, Co, Mn, Pd) in anhydrous HF (aHF) in a 1:1 molar ratio yielded XeF5M(SbF6)3 upon crystallization. All six structures were characterized at 150 K by single‐crystal X‐ray diffraction. For Mn, there is a phase transition at around 235 K, and for Pd between 260 and 296 K. Similar attempts to prepare new [XeF5]+/M2+ mixed‐cation salts with M2+ = Ca, Sr, Ba, Cr, Fe, Ag, Cd, and Hg were only successful for Hg, for which (XeF5)3[Hg(HF)]2(SbF6)7 was obtained. The crystal structures of XeF5M(SbF6)3 (M2+ = Mg, Co, Ni, Zn) and the low‐temperature phase α‐XeF5Mn(SbF6)3 are isotypic with the known XeF5Cu(SbF6)3. The main features of the crystal structures of β‐XeF5Mn(SbF6)3 and β‐XeF5Pd(SbF6)3 are similar to those of the other XeF5M(SbF6)3 compounds, that is, a 3D framework consisting of rings of MF6 octahedra that share the apexes with SbF6 octahedra, forming cavities within which the [XeF5]+ cations are located. At 296 K, the disordered [XeF5]+ cations in β‐XeF5Pd(SbF6)3 are ordered in the α‐phase (260 K). The crystal structure of (XeF5)3[Hg(HF)]2(SbF6)7 consists of columns of [Hg(HF)]2+ cations bridged by SbF6 units. The charge balance is maintained by the [XeF5]+ cations, which form secondary contacts with the F atoms of the SbF6 groups.

“…In all known compounds, where Ag 2+ is hexacoordinated, AgL 6 (L = ligand) octahedra are elongated or compressed [3]. The second reason for the apparently regular octahedral coordination of Ag(II) in IF 6 [Ag(SbF 6 ) 3 ] could be the trifold twinning of the monoclinic or orthorhombic unit cell, resulting in a pseudo trigonal/hexagonal lattice [4,5]. In this work we firstly describe the case in which, according to crystallographic data, Ag 2+ is found in an apparently regular octahedral coordination, meanwhile EXAFS analysis shows the presence of tetragonally elongated AgF 6 octahedra.…”

Section: Introductionmentioning

confidence: 99%

Apparently Regular Octahedral Coordination of Ag(II) in IF₆[Ag(SbF₆)₃]

Zeitschrift anorg allge chemie

Goreshnik

Arčon

et al. 2009

The crystal structure of IF6[Ag(SbF6)3] has been determined by X‐ray single crystal and X‐ray powder diffraction analysis. The structure consists from [Ag(SbF6)3]– chains and [IF6]+ cations placed between them. Ag2+ is found in regular octahedral coordination of six fluorine atoms [Ag–F = 6 × 2.170(12) Å]. EXAFS analysis of Jahn–Teller distortions in IF6[Ag(SbF6)3] shows that Ag2+ surrounding is elongated octahedral at room temperature. EXAFS signals are fitted with four short and two long Ag–F distances [4 × 2.11(1) Å; 2 × 2.40(2) Å]. This result is in apparent contradiction with X‐ray diffraction studies where the [AgF6] moiety appears to be a regular octahedra. The Raman spectrum of IF6[Ag(SbF6)3] is in agreement with the presence of regular IF6 and deformed SbF6 groups.