Iodine pentafluoride structure

The blue solid prepared by Rulf et al. (9) in 1906 and thought to be (SbF5)aI was probably a mixture of an la fluoroantimonate salt, and some Sb(III)-containing material. Pure crystalline la SbaFu has recently been prepared by the reaction of iodine with antimony pentafluoride in liquid sulfur dioxide as solvent (11). After removal of insoluble SbFg, deep blue crystals of la SbaFi were obtained from the solution. An X-ray crystallographic structure determination showed the presence of the discrete ions la and SbaFu . Crystalline solids that can be formulated as la SbaFu and Ia TaaFii have also been prepared by Kemmitt et al. (4) by the reaction of iodine with antimony or tantalum pentafluorides in iodine pentafluoride solutions. 

G. R. Jones, R. D. Burbank and N. Bartlett, The Crystal Structure of the 1 1 Molecular Addition Compound Xenon Difluoride-Iodine Pentafluoride, XeF2.IF5, Inorg. Chem. 9 (1970) 2264-2268. 

Figure 2.21 Structures of iodine pentafluoride (481) and iodine pentoxide (482).

Pure crystalline I2+Sb2F11 has been prepared by the reaction of iodine with antimony pentafluoride in liquid sulfur dioxide as solvent.789 After removal of insoluble SbF3, deep blue crystals of l2+Sb2Fn were obtained from the solution. An X-ray crystallographic structure determination showed the presence of the discrete... 

Little is known of the structures of the oxyfluorides listed in Table 9.6. Compounds XO2F are formed by all three halogens (Cl, Br, and I) and possibly also XO3F, since IO3F has been reported. The iodine compounds include the oxide pentafluoride, a type of compound also formed by Re and Os. A m.w. study indicates C/ symmetry, and presumably therefore the octahedral structure (e). 

The molecular structures of some representive neutral interhalogens, (a) chlorine trifluoride, CIF3 (distorted T-shaped) b) bromine pentafluoride, BrFs (square pyramidal) (c) iodine heptafluoride, IF7 (pentagonal bipyramidal) and (d) diiodine hexachloride, I2CI6 (planar dimer). 

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