difference between linear and bent, or v-shape

(Polar molecules, Non-polar molecules, etc.)

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George_Zhu
Posts: 29
Joined: Mon Jun 17, 2019 7:23 am

difference between linear and bent, or v-shape

Postby George_Zhu » Wed Jul 17, 2019 9:03 pm

why I3^-1 is a linear but not a bent or V shape?

Chem_Mod
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Re: difference between linear and bent, or v-shape

Postby Chem_Mod » Wed Jul 17, 2019 11:23 pm

Based on VSEPR geometries, if the central atom has three pairs of electrons, the molecule is linear (it must also have two noncentral atoms). The formal charge of I (central atom) is -1 so that is where the charge comes from in I3^-1. I can break the octet rule and hold more electrons since it has d orbitals. Because the formal charges of the noncentral atoms are already zero, it makes the most sense to add the extra lone pair to the central atom.


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