VSEPR halogen oxides

Several families of halogen oxides with X—F bonds exist FXO2 (X = C1, Br, I), FXO3 (X = C1, Br, I), F3XO (X = Cl, Br, I), F3XO2 (X = Cl, I) and F5IO the thermally unstable FCIO is also known. Their structures are consistent with VSEPR theory (16.26-16.31). 

These lowest oxidation states can be associated with a coordination number of two and a linear arrangement of the ligands about the central atom. On VSEPR theory these are 10-electron species, with a trigonal bipyramidal arrangement of three lone pairs of electrons in equatorial positions and two halogen ligands in axial positions. 

For xenon fluorides and oxides, for example, the same models can be apphed as for interhalogen and halogen oxy species. Furthermore, the very successful valence shell electron pair repulsion (VSEPR) rules for molecule and ion shapes are as effective for noble gas compounds and their relatives as for classical octet compounds. 

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