Question

The structure of ICI₂^- is

(a) Square planar

(b) Trigonal

(c) Trigonal bipyramidal

(d) Octahedral

Answer 1

Correct option is (c) Trigonal bipyramidal

The structure of ICl₂⁻​ is distorted trigonal bipyramidal. ICl₂⁻ has sp³d− hybridized state, having trigonal bipyramidal shape but distorted due to the presence of lone pair of electron on I− atom. The three lone pairs are in the equatorial positions, leaving the Cl and I in a linear molecular shape.