F-bridges

Me2Snp2 has a layer structure with octahedral Sn and trans-Me groups above and below the F-bridged layers as in SnF4 (p. 381). The... 

Deep pink polycrystalline solid Rup4 has been prepared by treatment of AsFs with [Ru(F)g] in anhydrous HF solution." A combination of X-ray synchrotron and neutron powder diffraction data reveal that each Ru-atom has six F ligands with an octahedral framework, four in the same plane, each shared with another Ru-atom, to form a puckered-sheet array (Ru—F (bridge) = 2.00 A and 2.00 A, Ru—F—Ru 133°). ... 

The F-bridge between two pentacoordinate Si atoms in (228) is introduced into (227) using crowned KF (Equation (17)) <90JA2422,92OM2099>. 

In THF, monomeric RMgX (I) and R2Mg (II) co-exist over a wide concentration range for the chlorides, bromides and iodides. The fluorides are present as the F-bridged dimers across the whole concentration range. Similarly, the alkoxide and aryloxide compounds, RMgOR, are present as the R2Mg(/r-OR )2Mg species in THF. 

The sodium salt Na5Zr2Fi3 contains [Zr2F13]5 anions of symmetry in which two ZrF7 monocapped trigonal prisms share the F atom that occupies the capping site (Zr—F terminal = 2.00-2.10, Zr—F bridging = 2.10 A).546... 

Figure 28. One of the two a-Po-related nets in the structure of Nb6Fi5. Large circles represent Nb. Small circles represent angular bridging F within a cluster, and circles of intermediate size represent F bridging cluster to cluster in a linear manner.

Monosubstituted eight-membered rings crystallize in a boat conformation (see Fig. 17). The molecules form chains via H-F bridges in the crystals.61... 

Disubstituted rings crystallize in a chair conformation (see Fig. 18). The molecules contain three-dimensional Fl-F bridges. The rings are perpendicular to each other.61... 

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