(Polar molecules, Non-polar molecules, etc.)
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On the homework for Focus 2E #11 part b, the book asks you to predict the shape of iodine trichloride. Why is the molecule t-shaped instead of trigonal? I thought lone pair-lone pair repulsion is the strongest, and therefore the lone pairs would want to be the furthest away from each other and 180 degrees apart, but in a t-shape molecule, the lone pairs are next to each other.
Another way to put it is that the molecule has 2 lone electron pairs and a Steric number of 5 (number of atoms bonded to a central atom of a molecule + the number of lone pairs attached to the central atom). Therefore, in terms of the VSEPR model it would be T-shaped.
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