If I2 is dissolved in aqueous KI, the intense yellow species I3- is formed. The structure of I3- ions is

Question

If I2 is dissolved in aqueous KI, the intense yellow species I3- is formed. The structure of I3- ions is (A) square pyramidal (B) trigonal bipyramidal (C) octahedral (D) pentagonal bipyramidal.

Tardigrade Admin · Accepted Answer

Total number of valence electrons in I3- = 7 × 3 + 1= 22. In triiodide ion, the central iodine atom is sp3 d hybridised and has trigonal bipyramidal structure in which the equatorial positions are occupied by lone pairs and the axial positions by iodine.

Q. If $I_{2}$ is dissolved in aqueous $K I$ , the intense yellow species $I_{3}^{-}$ is formed. The structure of $I_{3}^{-}$ ions is

square pyramidal

trigonal bipyramidal

octahedral

pentagonal bipyramidal.

Total number of valence electrons in $I_{3}^{-} = 7 \times 3 + 1 = 22$ .
In triiodide ion, the central iodine atom is $s p^{3} d$ hybridised and has trigonal bipyramidal structure in which the equatorial positions are occupied by lone pairs and the axial positions by iodine.

Q. If I2​ is dissolved in aqueous KI, the intense yellow species I3−​ is formed. The structure of I3−​ ions is