Tin fluorides

The main binary tin fluorides are stannous fluoride and stannic fluoride. Because the stannous ion,, is readily oxidized to the stannic ion,, most reported tin and fluorine complexes are of tin(IV) and fluorostannates. Stannous fluoroborates have also been reported. 

Fluor-wasserstoffaaure, /. hydrofluoric acid, -zink, m. n. zinc fluoride, -zinn, n. tin fluoride. 

The active part of the molecule is the fluoride ion, which is why two other fluorine-containing compounds, stannous fluoride (tin fluoride) and sodium monofluorophosphate, are also used. 

Synthesis and Characterization. Tris(trimethylsilylpropyl)tin fluoride (PTF) and tris(trimethylsilylmethyl)tin fluoride (MTF) were synthesized according to scheme A (Figure 1) while scheme B (Figure 1) was followed in the synthesis of dibutyl-(trimethylsilylpropyl)tin fluoride (BTF). MTF has been reported in the literature (6) however, it was synthesized to compare its solution properties with the other two novel compounds. The steps involved in these syntheses were straight-forward and thus need no elaboration. In the synthesis of BTF, the unsymmetrical triorganotin fluoride, bromination of tetraorganotin compound resulted... 

Micellar systems (i.e.,. Shenoy 1984 Ohlendorf Brunn) as well as other colloidal systems (polyphosphates (Hunston), tri-n-butyl-tin-fluoride, e.g. Dunn Evans) come under the heading surfactants . It is necessary to differentiate soaps into anionic, cationic, and non-ionic types. Among the anionic types one can find, for instance, alkali metals and ammonium salts consisting of various fatty acids, which were... 

Dunn P, Oldfield D (1970) Tri-n-butyl-tin-fluoride. A novel coordination polymer in solution J Macromol Sci A4 1157... 

Ci2H27FSn = tri butyl tin fluoride C-i2B27dSn = tri butyl tin chloride Cardio = cardiovascular d = day(s) Derm/oc = dermal/ocular hr = hour(s) ... 

Andersen KE, Petri M. 1982. Occupational irritant contact folliculitis associated with triphenyl tin fluoride (TPTF) exposure. Contact Dermatitis 8 173-177. 

Stannous Fluoride or Tin Fluoride, SnF2, mw 156.72, wh crysts, mp 210—215° bp— decompd in air to SnOF2 si sol in w slowly hydrolyzes. Can be prepd by the dissolution of stannous oxide in aq HF or by dissolving metallic Sn in anhyd or aq HF (Refs 1 3). Used in toothpaste as fluoride source Refs 1) Gmelin-Kraut Syst Number 46,... 

TRIS(l-CHLOROMETHYL-2-CHLOROETHYL)PHOSPHATE see FQU875 TRIS(p-CHLOROPHENYL)TIN FLUORIDE see TNG050... 

X = Ln, Tl, M = Sn, Pb show that the complexes comprise octahedral [FgM] ions and isolated fluoride ions rather than any seven-coordinate metals. Other tin fluorides have more complex structures, such as the dimeric [Su2F4] ion present in [NH4]4[Sn2F4](N03)2" and in mixed halide complexes, such as Cs2SngBr3Fii which has in the crystal three distinct tin sites, each of which has close contacts with the fluoride ions only." The electronic effects of adduct formation of halides of germanium(IV) and tin(IV) have been reviewed with particular reference to the geometry of the complexes formed. 

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