Why is BF3 considered a Lewis Acid?

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SubparChemist
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Why is BF3 considered a Lewis Acid?

Postby SubparChemist » Tue Dec 01, 2015 2:36 pm

Why is BF3 considered a Lewis Acid? I thought Boron was content with only 6 valence electrons? Could you also give me an example of a reaction in which BF3 acts as a Lewis Acid, with the corresponding equilibrium equation?

Chem_Mod
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Re: Why is BF3 considered a Lewis Acid?

Postby Chem_Mod » Tue Dec 01, 2015 3:13 pm

Boron is content with 6 electrons, but it still has the ability to accept another electron pair which makes it a lewis acid. For example, BF3 + acetone [tex] will create a bond between the boron and oxygen. In that case, the boron accepts an electron pair from the oxygen.


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