Exchange Interactions and Magnetic Properties of a Molecular Mn -Ring Complex.

[Mn O(OAc) (HOAc)]  ⋅ x AcOH (x=6-9) represents a rare example of a compound containing molecular Mn -rings. These are formed by Mn (μ -O) subunits in which the high-spin Mn(III) centers are bridged by three pairs of acetate anions (AcO ). An AcOH molecule coordinates to one of the Mn atoms leading to [Mn (μ -O)(μ -OAc) (AcOH)]-units, designated in short as Mn -units, that are interconnected by acetate anions via the other two Mn atoms to form Mn -rings.

Syntheses and Characterization of the Mixed-Valent Manganese(II/III) Fluorides MnF and MnF.

We obtained single crystals of the binary mixed-valent fluorides MnF and MnF using a high-pressure/high-temperature approach. MnF crystallizes isotypic to CaCrF in the monoclinic space group 2/ (No. 15), with = 8.

Coexistence of Two Different Distorted Octahedral [MnF ] Sites in K [MnF ]: Manifestation in Spectroscopy and Magnetism.

As a consequence of the static Jahn-Teller effect of the E ground state of Mn in cubic structures with octahedral parent geometries, their octahedral coordination spheres become distorted. In the case of six fluorido ligands, [MnF ] anions with two longer and four shorter Mn-F bonds making elongated octahedra are usually observed. Herein, we report the synthesis of the compound K [MnF ] through a high-temperature approach and its crystallization by a high-pressure/high-temperature route.

Binary Lead Fluoride Pb F.

The binary lead fluoride Pb F was synthesized by the reaction of anhydrous HF with Pb O or by the reaction of BrF with PbF . The compound was characterized by single-crystal and powder X-ray diffraction, IR, Raman, and solid-state MAS F NMR spectroscopy, as well as thermogravimetric analysis, XP and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. Solid-state quantum-chemical calculations are provided for the vibrational analyses and band assignments.

HF-Free Synthesis of LiSiF:Mn: A Red-Emitting Phosphor.

LiSiF:Mn was synthesized via a new HF-free synthesis route by a high-pressure/high-temperature doping experiment at 5.5 GPa and 750 °C. It is proven that the phosphor cannot be synthesized by the common wet-chemical precipitation route in aqueous HF.

(GeP): a binary analogue of P as a precursor to the ternary cluster anion [Cd(GeP)].

The novel binary P analogue (GeP) proved to be a suitable precursor for heteroatomic cluster synthesis. Over time in solution, it rearranges to form (GeP), as shown by NMR studies and X-ray diffraction. Reactions of (GeP) with CdPh afford [K(crypt-222)][Cd(GeP)], containing an unprecedented ternary cluster anion with a triangular Cd moiety.

Redetermination of the crystal structure of KHg(SCN).

Single crystals of KHg(SCN) [dipotassium tetra-thio-cyanato-mercurate(II)] were grown from aqueous solutions of potassium thio-cyanate and mercury(II) thio-cyanate and studied by single-crystal X-ray diffraction. In comparison with the previously reported structure model [Zvonkova (1952 ▸). .

Redetermination of the crystal structure of NbF4.

Single crystals of NbF4, niobium(IV) tetra-fluoride, were synthesized by disproportionation of Nb2F5 at 1273 K in a sealed niobium tube, extracted and studied by single-crystal X-ray diffraction. Previous reports on the crystal structure of NbF4 were based on X-ray powder diffraction data and the observed isotypicity to SnF4 [Gortsema & Didchenko (1965 ▸). Inorg.