Iodine pentafluoride positions

In its chemical properties, the oxyfluoride behaves as a derivative of five-positive platinum. Potassium hexafluoroplatinatc(v) (Found F, 32-0. KPtF, requires F, 32-7%) is formed when the oxyfluoride vapour is passed over hot potassium fluoride and when potassium fluoride is mixed with the oxy-fluoridc in iodine pentafluoride solution. Potassium hexafluoroplatinatc(v) has a rhombohedral unit cell with a = 4-97 A, a = 97-5°, and is isomorphous with its ruthenium, osmium, and iridium analogues. Dissolution of the oxyfluoride in chlorine trifluoride and in iodine p>entafluoride yields 1 1 platinum penta-fluoridc-solvent adducts. 

Because all six electron groups have the same ideal bond angle, it makes no difference which position one lone pair occupies. Five bonded atoms and one lone pair define the square pyramidal shape (AX5E), as in iodine pentafluoride (IF5) ... 

Iodine pentafluoride, IF5, has found some synthetic application as a powerful fluorinating reagent [1311, 1312]. For example, IF5, in combination with pyridine and HF, can be used as a fluorination reagent for the introduction of fluorine atoms to the a-position in sulfldes (Scheme 3.365) [1313]. A similar fluorination of sulfldes using IF5 without pyridine and HF affords a mixture of polyfluorinated products [1314]. 

Through reduction or oxidation of the molecule by a dopant molecule. Atoms or molecules with high electron affinity, such as iodine, antimony pentafluoride (SbCls), or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), may oxidize a typical organic semiconductor such as poly(p-phenylene) derivatives, leaving them positively charged. Reduction, i.e., addition of an electron, may be obtained by doping with alkali metals. 

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