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) XeF2 is isoelectronic to 
and has a linear structure.
(iii) XeO3 is isostructural to
and has a pyramidal molecular structure.
