Among the following species, the one that has pentagonal shape is: (Given: atomic numbers of O, F, S, I and… · ABC26IN0327
Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Chemical Bonding – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Medium
Among the following species, the one that has pentagonal shape is:(Given: atomic numbers of $\mathrm{O}$, $\mathrm{F}$, $\mathrm{S}$, $\mathrm{I}$ and Xe are 8, 9, 16, 53 and 54, respectively)
(a)$\left[\mathrm{SF}_{5}\right]^{-}$
(b)$\mathrm{XeOF}_{4}$
(c)$\left[\mathrm{XeF}_{5}\right]^{-}$
(d)$\mathrm{IF}_{5}$
Answer
Answer: C ✓ checked by 4AB · confidence high
The source book printed D; on checking, C is correct — see the explanation.
Book printed (d).
Explanation
[XeF₅]⁻ has two lone pairs trans to each other — pentagonal planar; SF₅⁻, XeOF₄ and IF₅ are square pyramidal (c).