Is ICl4- polar or nonpolar? – (Polarity of ICl4-)
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The question is –
Is ICl4– polar or nonpolar?
Answer:
⇒ ICl4– is non-polar.
Explanation:
Tetrachloroiodide (ICl4–) is a non-polar molecular ion as the dipole moments of polar I-Cl bonds get canceled equally in opposite directions in the symmetrical square planar molecular shape and geometry.
ICl4– consists of four I-Cl single covalent bonds.
Each I-Cl bond is polar as a specific electronegativity difference of 0.50 units exists between an iodine (E.N = 2.66) and a chlorine (E.N = 3.16) atom.
Only 4 valence electrons of the central I-atom get consumed in covalent bonding out of the 7 initially available in ICl4–.
There are 2 lone pairs of electrons present on the central I-atom that carries a -1 formal charge.
This leads to strong lone pair-lone pair and lone pair-bond pair electronic repulsions.
Thus, ICl4– adopts a square planar shape, different from its ideal octahedral electron pair geometry.
The lone pairs are kept at a maximum distance from one another in the symmetrical square planar shape.
The oppositely pointing I-Cl dipole moments get canceled equally in the symmetrical molecular shape to yield an overall non-polar molecular ion (net µ = 0).
Also, check –
⇒ How to identify polar or nonpolar compounds?
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