Both aluminium and iodine form chlorides, Al₂Cl₆ and I₂Cl₆, Cl atoms is attached as "bridging". I₂Cl₆ has a shape of square planar shape.
What is mean by square planar shape?
In chemistry, the stereochemistry (spatial arrangement of atoms) that certain chemical compounds is made is described as square planar molecular geometry. The atoms in molecules with this shape are located at the corners, as the name implies.
One of the geometries that characterizes a particular atom hybridization is square planar. One core atom is surrounded by bonds to four additional atoms in a planar configuration. This shape produces dsp2 hybridization, which is hybridization. An atom's 3d-orbital energy is either comparable to 3s and 3p energy or to 4s and 4p energy.
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