12332-08-0Relevant articles and documents
Jonkers, G.,Kerk, S. M. van der,Mooyman, R.,Lange, C. A. de
, p. 252 - 256 (1982)
The preparation and structure of Ge3F8-a new mixed-valence fluoride of germanium, a convenient source of GeF2
Hector, Andrew L.,Jolleys, Andrew,Levason, William,Pugh, David,Reid, Gillian
, p. 14514 - 14516 (2014)
The new binary mixed-valence fluoride of germanium, Ge3F8, has been obtained by heating GeF4 with powdered Ge in an autoclave (390 K/4 bar/48 h). The structure contains pyramidal GeIIF3 and octahedral GeIVF6 units, linked by fluoride bridges. The new compound is the missing member of the series (GeF2)n·GeF4 (n = 2, 4, or 6). Sublimation of (GeF2)n·GeF4in vacuo provides a convenient source of GeF2 in ca. 30% overall yield. This journal is
About the new mixed valent Ge7F16: [GeF6]2- octahedra between [Ge6F10]2+ sheets - A contribution to the stereochemical activity of lone pairs
Koehler,Chang
, p. 596 - 602 (2008/10/09)
For the first time Ge7F16 colourless transparent single crystals have been prepared by the reduction of GeF4 with Ge at 300°C. The extremely hygroscopic fluoride crystallizes in a new structure type in Cc with a = 1818.0(6) pm, b = 754.3(2) pm, c = 1030.4(3) pm, β = 90.33(3)° und Z = 4. Ge7F16 is a mixed valent fluoride according to 6GeF2×GeF4. Characteristical building units of the new structure type are [Ge6F10]2+ sheets, which are connected via [GeF6]2- octahedra. The Ge2+ within the sheets are coordinated by three nearest F- with distances of 183-218 pm and together with these form distorted trigonal pyramids. The structure of Ge7F16 can be considered as a member of the homologues series Gem4+Gen2+F4m+2n with m = 1 and n = 6. Bond order summations, band structure calculations and calculations of the Madelung part of the lattice energy, MAPLE, have been used for the discussion of the bonding situation.
