Question

What is the hybridization of the central iodine atom in i3−?

Answer 1

The central iodine atom in triiodide has sp3d hybridization.In triiodide anion, the central iodine atom has three equatorial lone pairs of electrons and the terminal iodines are bonded axially in a linear shape. Electrons in sp3d hybridization are arranged in trigonal bipyramidal symmetry.
Explanation:
When you draw the Lewis structure of this particle, you'll realize that the central I atom has a pair of bonds and three individual pairs of electrons. as a result of there are five things around that central I atom, it's sp3d hybridized.

The bonds during a gas (CH4) molecule are fashioned by four separate however equivalent orbitals; one 2s and 3 2p orbitals of the carbon interbreed into four sp3 orbitals. within the ammonia molecule (NH3), 2s and 2p orbitals produce four sp3hybrid orbitals, one among that is occupied by a lone try of electrons.

Answer 2

Answer is: the central iodine atom in triiodide has sp3d hybridization.
In triiodide anion the central iodine atom has three equatorial lone pairs of electrons and the terminal iodines are bonded axially in a linear shape. Electrons in sp3d hybridization are arranged in trigonal bipyramidal symmetry.