Preparation and X-ray crystal structure of Sn3F8

Abstract

The oxidation of SnF, in HF with O,, F,, or SO, yields insoluble Sn3F8; the crystal structure of this new compound shows trans-fluorine-bridged SnIVF, units linked to polymeric Sn*F chains. TIN(II) fluoride is readily soluble in anhydrous HF a t 20O.1 Such solutions were found to react smoothly with F, [P(F,)

Neutron diffraction study of β-SnF2

“…This is in agreement with earlier investigations, like those on Sn3F8 (Dove, King, andKing, 1973), Na2Sn2F5 (McDonald, Larson, andCromer, 1964), KSnF3 · \ H20 (Bergerhoff, Goost, and Schulzte-Rhonhof, 1968), NH4SnFa (Bergerhoff, andGoost, 1973), SnCl2 (van den Berg, 1961), K2SnCl4 · H20 (Kamenar and Grdenic, 1962) or SnCIF (Geneys, Vilminot, and Cot, 1976). In all known cases the pyramidal angle is less than 90…”

Binary Lead Fluoride Pb3F8

“…No phase change was observed upon cooling from room temperature to 100 K and Table S2, Supporting Information, holds details of the single crystal structure determination. Surprisingly, Pb 3 F 8 is not isotypic to the compounds M 3 F 8 ( M =Ge, Sn) but, to the best of our knowledge, represents a novel structure type . As the crystal structure of Pb 3 F 8 is complicated we will start with the local structure description before we describe it globally.…”

“…In addition, PbF 3 , which is better described as Pb 2 F 6 containing Pb II and Pb IV atoms, was reported . While for Sn and Ge also the mixed valence compounds M 3 F 8 ( M =Sn, Ge), and even Ge 5 F 12 and Ge 7 F 16 are known, only the three binary lead fluorides mentioned above are unambiguously known . Therefore, the existence of a mixed valence compound of the composition Pb 3 F 8 appears to be likely.…”

Halides of the Heavier Group 14 Homologues Germanium, Tin, and Lead—A Journey through Unusual Compounds and Oxidation States

“…Tin difluoride is obtained by evaporation of SnO into 40 % fluoric acid . Oxidation of SnF 2 in HF results in the compound Sn 3 F 8 , in which trans ‐fluorine bridged Sn IV F 6 units are linked to polymeric Sn II F 2 chains . Tin dichloride is synthesized by dissolving elemental tin in hydrochloric acid .…”