Final answer:
ICl4- has a square planar structure with Cl-I-Cl bond angles of 90° and 180°, attributed to its AX4E2 designation with two lone pairs occupying axial positions.
Step-by-step explanation:
The molecule in question is ICl4-, which is predicted to have a square planar molecular structure. Under the VSEPR theory, this molecule is designated as AX4E2, indicating it has a total of six electron pairs consisting of four bonding pairs and two lone pairs. The two lone pairs occupy the axial positions, reducing the repulsion between them and the bonding pairs. Consequently, the four bonding pairs arrange themselves in a square planar fashion in the equatorial plane, leading to Cl-I-Cl bond angles of 90° along the edges of the square and 180° across the diagonal of the square plane.