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

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Postby rkusampudi » Sat Nov 11, 2017 9:23 pm

Does resonance have an impact on the molecular shape? How do we decide which Lewis structure to base our VSEPR theory on?

Matthew 1C
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Joined: Fri Sep 29, 2017 7:06 am

Re: Resonance

Postby Matthew 1C » Sat Nov 11, 2017 9:56 pm

Since all bonds are treated as equivalent in the VSEPR model, it doesn't matter which resonance structure is used

Ramya Lakkaraju 1B
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Joined: Fri Sep 29, 2017 7:03 am

Re: Resonance

Postby Ramya Lakkaraju 1B » Sat Nov 11, 2017 9:57 pm

Resonance shouldn't have an effect on the shape since technically, a resonant structure is the same structure put together in a different way. However, you should use formal charges to decide on the best lewis structure before you decide on the shape.

Manasvi Paudel 1A
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Joined: Sat Jul 22, 2017 3:00 am

Re: Resonance

Postby Manasvi Paudel 1A » Sun Nov 12, 2017 8:42 pm

Resonance does not influence shape. What configuration to use is determined by using formal charges. The sum of all the formal charges should equate the charge of the ion, or at least be close to it.

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