(Polar molecules, Non-polar molecules, etc.)
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Problem 2E9 asks to determine the shape of an ICl3 molecule. When I drew the Lewis Structure, I had 3 bonding pairs and 2 lone pairs so I assumed the shape would be a trigonal bipyramidal. However, in the solution manual it says that it has a T shape. Why is this the case?
Trigonal bipyramidal does have does have five groups of electrons. However, it does not have any lone pairs like the ones you drew in the lewis structure. A structure with five electron groups and 2 lone pairs is called T shape. You should look at the number of lone pairs when naming.
A structure that is trigonal bipyramidal has 5 bonding pairs of electrons around the central atom. However, a structure with 3 bonding pairs and 2 lone pairs is T-Shaped as the lone pairs change the bond angle and orientation of the molecule.
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