Structure of the Interhalogen Compounds. III. Concluding Note on Bromide Trifluoride, Bromine Pentafluoride, and Iodine Pentafluoride

Cs[Cl3F10]: A Propeller‐Shaped [Cl3F10]− Anion in a Peculiar A[5]B[5] Structure Type

“…To the best of our knowledge, a compound containing [I 3 F 10 ] − anions is not known yet. The calculated X ‐F distances within the X F 3 subunits are very similar to those in the solid‐state structures of the halogen trifluorides . This indicates a rather weak interaction of the X F 3 units with the central μ 3 ‐F atom.…”

Gold Pentafluoride: Structure and Fluoride Ion Affinity This work was supported by the Deutsche Forschungsgemeinschaft and the Fond der Chemischen Industrie.

“…23 AuF 5 is evidently the only pentafluoride that is dimeric. Other pentafluorides are monomeric (P,24 As,25 Cl,26 Br,27 I27, 28), tetrameric29, 30 (Nb,31 Ta,31 Cr,32 Mo,33 W,34 Tc,35 Re,36 Ru,37 Os,38 Rh,39, 40 Ir,41 Pt42, 43), or polymeric (Bi,44 V,36 α ‐UF 5 ,45 β ‐UF 5 46).…”

A redetermination of the orthorhombic IF7 structure

“…There appears to be some residual attraction between F,_, and F~ and distinctly weakened bonding to the I atom. When the molecule dissociates the configuration of the 5 bonds at normal length should offer no obstacle to ready rearrangement to the tetragonal pyramid configuration known to exist for halogen t)entafluorides (Lord et al (1950), Gutowsky & Hoffman (1951), Burbank & Bensey (1957c)). At the same time the extreme fluorinating power of IF7 may come al)out from the direct conversion of atoms F2 and F j into atomic fluorine.…”