When to Use Radicals  [ENDORSED]

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

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When to Use Radicals

Postby HanSitoy » Sun Nov 12, 2017 1:03 am

Hi! I just want to clarify... if a compound contains a radical, would it be placed on the more electronegative atom?

Shannon Wasley 2J
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Re: When to Use Radicals

Postby Shannon Wasley 2J » Sun Nov 12, 2017 11:41 am

More electronegative elements have higher tendencies to pull electrons towards themselves. Therefore, the higher electronegative an electron the more likely the will want to obtain a full octet. For example, in the case of nitrogen monoxide (NO), there are 11 valence electrons that need tone placed around the two elements. It comes out to have a double bond between the N and the O and the O would have a full octet around it, while the N only has 7 valence electrons. In this case, Oxygen has the higher electronegativity, therefore attracting the electron better, and leaving Nitrogen without a full octet. If there is more valence electrons, where one of the elements would have an exapnded octet, then the more electronegative element would get the "extra" electron. However, make sure to check the formal charge, in order to check if there is a better way to form the molecule.

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Re: When to Use Radicals  [ENDORSED]

Postby Chem_Mod » Sun Nov 12, 2017 3:12 pm

Give an octet to the atoms with higher electronegativity and less than an octet (radical) on the atom with lower electronegativity.
See homework questions illustrating this.

All the midterm Lewis structures came from the homework questions. :-)

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