Question:
Give the formula and describe the structure of a noble gas species which is isostructural with:
(i) $\mathrm{ICl}_{4}^{-}$
(ii) $\mathrm{IBr}_{2}^{-}$
(iii) $\mathrm{BrO}_{3}^{-}$
Solution:
(i) $\mathrm{XeF}_{4}$ is isoelectronic with $\mathrm{ICl}_{4}^{-}$and has square planar geometry.
(ii) $\mathrm{XeF}_{2}$ is isoelectronic to $\mathrm{IBr}_{2}^{-}$and has a linear structure.
(iii) $\mathrm{XeO}_{3}$ is isostructural to $\mathrm{BrO}_{3}^{-}$and has a pyramidal molecular structure.
