72151-31-6Relevant academic research and scientific papers
Syntheses and properties of FOIF4O, ClOIF4O, HOIF4O, and tetrafluoroperiodates
Christe, Karl O.,Wilson, Richard D.,Schack, Carl J.
, p. 2104 - 2114 (2008/10/08)
Mixtures of cis- and trans-CsIF4O2 were prepared by the interaction of CsIO4 with either anhydrous HF, BrF5, ClF3, ClF5, or F2. The vibrational spectra of these mixtures were recorded, and partial assignments are given for cis- and trans-IF4O2-. The assignments for trans-IF4O2- were supported by a normal-coordinate analysis. The CsIF4O2 salt dissolves in CH3CN with the formation of IF4O2- anions but undergoes solvolysis in anhydrous HF with formation of HOIF4O. An improved synthesis of HOIF4O from CsIF4O2 and BiF5 in anhydrous HF is reported, and its Raman and 19F NMR spectra were recorded. The interaction of CsIF4O2 with NF4SbF6 in anhydrous HF results in solutions containing NF4+, HF2-, and HOIF4O. When standing or when pumped to dryness, these mixtures decompose to yield NF3 and the new compound FOIF4O in high yield. The latter compound, the first known example of an iodine hypofluorite, was thoroughly characterized and shown by vibrational and NMR spectroscopy to be a mixture of the cis and trans isomers. For comparison, the vibrational spectra of IF5O have also been recorded. The reaction of CsIF4O2 with ClOSO2F was shown to yield the novel compound ClOIF4O. The fluorination reactions of CsIO4, CsIF4O2, IF5O, and HOIF4O with elementary fluorine were also studied.
