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Emma Li 2C
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Postby Emma Li 2C » Wed Dec 06, 2017 11:28 pm

Why is BF3 considered a Lewis acid?

Thank you!

Hazem Nasef 1I
Posts: 51
Joined: Tue Oct 10, 2017 7:13 am

Re: BF3

Postby Hazem Nasef 1I » Wed Dec 06, 2017 11:34 pm

A lewis acid is a species which accepts electron pairs. BF3 is electron deficient, because it only has 6 valence electrons. It has room to form a coordinate covalent bond, by accepting an electron pair from a lewis base, such as ammonia, which has a lone pair of electrons.

Mike Vinci 2B
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Postby Mike Vinci 2B » Wed Dec 06, 2017 11:37 pm

Hi Emma,
Lewis acids are known by nature to accept electron-pairs. The lewis structure of BF3 shows no lone electron pairs on the central boron atom, and it is therefore more inclined to want to accept electron-pairs making it a Lewis acid.

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