BF3 as a lewis acid

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Izzy Ick 4B
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Joined: Fri Sep 25, 2015 3:00 am

BF3 as a lewis acid

Postby Izzy Ick 4B » Fri Nov 20, 2015 8:41 pm

Why is BF3 considered a Lewis acid? Using the definition of Lewis acid we learned in class how is this the case?

Anna Nordstrom 1A
Posts: 15
Joined: Fri Sep 25, 2015 3:00 am

Re: BF3 as a lewis acid

Postby Anna Nordstrom 1A » Fri Nov 20, 2015 9:05 pm

If you draw out the lewis structure for BF3, you will get the Boron in the center with the three Fluorine's coming off of it. All of the Fluorine's have a full valance electron shell but the Boron only has the three Fluorines coming off of it, and therefore only has 6 electrons in its outer shell. This means the Boron is able to accept an electron pair to get a full outer shell, making it a Lewis Acid.

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