What atomic or hybrid orbital on the central I atom makes up the sigma bond between this I and an outer Cl atom in iodine pentachloride, ICl5 ? orbital on I What are the approximate Cl-I-Cl bond angles ? (list all possible separated by a space)

The hybrid orbitals involved are sp3d2

The bond angle is less than 90°

Explanation:

In ICl5, hybridization of the central iodine atom is sp3d2. Knowing that iodine has one pair of unshared electrons in the hybrid orbitals and it is bonded to 5 chlorine atoms in the compound, the most stable configuration, minimizing the repulsion between the pair of electrons and the electrons from the chemical bonds is a square pyramidal arrangement with bond angle less than 90°.

See image attached for more details

2b2t

explanation:

2b2t