Structure of HClO3

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Structure of HClO3

Postby ran2000 » Tue Oct 30, 2018 12:16 pm

How do we draw the lewis structure of HClO3?

Christopher Tran 1J
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Joined: Fri Sep 28, 2018 12:15 am

Re: Structure of HClO3

Postby Christopher Tran 1J » Tue Oct 30, 2018 5:36 pm

HClO3 has 1+7+(3*6) = 26 valence electrons

Start by putting Cl in the center (since it's the least electronegative), then draw the three oxygen around the Cl. For one of the oxygen, add the hydrogen next to it.
Connect each of them with a single bond, and then fill the rest of the lone pairs.

However, if you calculate the formal charges, two of the oxygen have a formal charge of -1, and the Cl has a formal charge of +2.

To minimize the formal charges, take one of the lone pairs from each oxygen and convert the single bond into a double bond. Chlorine is able to have an expanded octet.

This should be the most favorable structure

This YouTube video should also help:

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