E. V. Kovaleva

Biological Properties of Antimony(III) Fluoride Complexes

Result of a study of how antimony trifluoride and fluoride complexes MSb2F7 (M = K, Rb, Cs, Tl, NH4), MSbF4 (M = Na, K, Rb, Cs, NH4), and M2SbF5 (M = Na, K, Rb, Cs, Tl, NH4) affect the growth of associations of marine bacteria and vital activity of marine alga Ulva Fenestrata are presented. The possible ways of using Sb(III) fluoride compounds are discussed.

Crystal structures of tetrafluoroantimonates(III) of single and double protonated 3-amino-1,2,4-triazolium cations

Crystal structures are determined by X-ray crystallography for tetrafluoroantimonates(III) of single and double protonated 3-amino-1,2,4-triazolium cations of the composition (C2H5N4)SbF4 (I) (monoclinic: a = 4.7723(6) Å, b = 19.643(2) Å, c = 7.6974(9) Å, β = 97.239(2)°, Z = 4, Cc space group) and (C2H6N4)(SbF4)2 (II) (monoclinic: a = 4.7617(3) Å, b = 15.512(1) Å c = 7.4365(5)Å β = 107.706(1)°, Z = 2, P21/n space group). The structure of I is built from complex [SbF4]− anions and single charged (C2H5N4)+ cations; the structure of II is built from the same anion and double charged 3-amino-1,2,4-triazolium cation: (C2H6N4)2+. In the structure, weak interactions Sb…F join the anions in polymeric layers [SbF4]nn− that are assembled in a 3D framework by N-H…F hydrogen bonds. The formation of the double protonated 3-amino-1,2,4-triazolium cation (C2H6N4)2+, found in the crystal structure of II, is observed for the first time.

Crystal structure of the molecular adduct of antimony(III) fluoride with L -phenylalanine

The crystal structure of a newly synthesized molecular adduct of antimony(III) fluoride with L-phenylalanine of the composition SbF3(C9H11NO2) is determined for the first time (monoclinic crystal system: a = 5.8742(1) Å, b = 6.2079(1) Å, c = 15.5401(3) Å, β = 90.741(1)°, Z = 2, P21 space group). The structure consists of SbF3 molecules and L-phenylalanine bound into polymer chains by bidentate bridging carboxyl groups of amino acid molecules. Weak Sb⋯F(3)b bonds organize the adjacent chains into polymer ribbons that are bound into layers by N-H⋯F and N-H⋯O hydrogen bonds.

Structural Transformations and Ionic Mobility in CsSbF3(H2PO4)

Abstract1H, 19F, 31P NMR, DSC, and XRD methods are used to study ionic mobility and structural transformations in the CsSbF3(H2PO4) compound (I). Radical changes in 1H, 19F, 31P NMR spectra above 390 K are associated with a crystalline disordered phase which forms in I at 400–420 K. This phase demonstrates high ionic mobility and further transforms (above 425 K) into the amorphous (glassy) phase. We have determined the types of ionic mobility in this compound and in its amorphous product. According to the NMR data, the diffusion in the proton sublattice of the disordered and amorphous phases proceeds even at room temperature.

Properties of fluoroantimonates(III) complexes with amino acids

Crystalline complex fluoroantimonates(III) with amino acids (glycine, β-alanine, DL-serine, DL-valine, L-leucine, and L-phenylalanine) have been prepared. The complexes stability in aqueous solutions has been studied with the cementation method. 1H NMR studies of aqueous solutions of the amino acids complexes with SbF3 at pH 1–6 and room temperature are reported. Preparation of polycrystalline metal antimony in aqueous solutions of tetrafluoroantimonates(III) complexes with the protonated amino acids has been demonstrated.