[en] Short note

[en] The method of differential thermal analysis has been used to investigate solid-liquid equilibria in the systems ClF₅-BF₃ and BrF₅-BF₃ in the whole range of concent-- rations of components. No formation of chemical compounds is found. BrF₅-BF₃ system refers to the series of simple systems of the eutectic type and is characterized by eutectics depleted in bromine pentafluoride content (less than 5 mol. %) with the melting temperature close to melting temperature of pure boron trifluoride. In the ClF₅-BF₃ system components are mutually insoluble in both liquid and solid states

[en] Synthesis of chloryl tetrafluovoborate, formed under BF₃ reaction with CF₃ in the presence of moisture traces, is performed and its x-ray diffraction investigation is made. Monoclinic crystal lattice parameters at -120 deg C are: a=5.427(3), b=8.517(5), c=9.446 (5)A, β=97.97(4) deg, v=432.4(3)A⁰³, Z=4, sp. gr. Cc. ClO₂⁺BF₄^- structure is formed of alternating layers of BF₄^--anions and ClO₂⁺ - cations of angular structure. B-F bond lengths in distorted tetrahedric BF₄^--anion are changed from 1.385(1) to 1.411(1)A

[en] Solid-liquid equilibrium in ClF₃-BF₃ (1) and BrF₃-BF₃ (2) systems was measured within the whole range of component concentrations. One congruently melting copmpound (ClF₃xBF₃) (melting poiunt - 30 deg C) is formed in the system (1). Two incongruently melting compounds: BrF₃xBF₃ (melting point - 30 deg C) and BrF₃x2BF₃ (melting point - 121 deg C) were identified in the system (2). Conclusion on relative strength of halogen fluorides in acid-basic interactions according to Lewis was made on the basis of equilibria comparison in HalF₅-BF₃ and HalF₃-BF₃ systems

[en] Crystal structure of ClF₂NbF₆ (1) and ClF₂TaF₆ (2) were investigated by the method of X-ray diffraction analysis. Salts 1 and 2 are isostructural, crystals are rhombic: a = 9.981(2) and 10.049(2), b = 5.781(1) and 5.775(1), c = 10.552(2) and 10.670(2) A, V = 608.9(3) and 619.2(3) A³, Z = 4, d_calcd 3.058 and 3.952 g/cm³, sp. gr. Pcca. Both salts are characterized by ionic structure. Bond lengths and valent angles, general view of 1 crystal structure are presented

[en] Difluorochloronium tetrafluoroborate (1) is synthesized by direct reaction of ClF₃ with BF₃ using methods excluding hydrolytical processes. Using zone melting monocrystal (1) is grown and its total X-ray study is carried out. Crystals are monoclinic, at -120 deg C a=5.644(3), b=8.873(4), c=9.822(4) A, β=116.84(4), V=438.9(4) A³, Z=4, space group P2₁/c. Results of X-ray study confirmed the earlier hypothesis on ion complex structure and ClF₂⁺ cation angle configuration. Crystalline structure of (1) is characterized by interchange of BF₄^- anion and ClF₂⁺ cation layers

[en] Preparation of fats M[Os(CO)₃Cl₃] (M=Cs, K), K₂[OsCOCl₅]xH₂O, K₂[OsCOCl₅]x4 fats K[Os(CO)₃Cl₃] is described. Compounds are characterized using IR spectra. According to the results of the conducted X-ray structure study fats Cs[Os(CO)₃Cl₃] crystals are monoclinic ones at -130 deg C, a=9.939 (2), b=9.009 (2), c=11.100 (2) A, β=90.88 (3)⁰, V=1003,7 (3) A³, Z=4, space group P2₁/c

[en] Ytterbium (2) complex with anion-radical anthracene ligand [Yb²⁺(OP(NMe₂)₃)₆(C₁₄H₁₀^-)₂] was prepared by interaction of zero valent ytterbium and anthracene with subsequent crystallization from HMPA. The structure of the complex is studied by the method of X-ray diffraction analysis. The crystals are monoclinic, at -143 deg C a=16.983 (3), b=24.272 (2), c=12.237 (2) A, β-122.73 (3₎ deg, V=4243.5 (7) a³, Z=2, sp.gr. C2. The structure was decoded by the method of heavy atom and refined to R=0.109, R_w=0.108