[T]

Hello,

On this site: http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Descriptive_Chemistry/Elements_Organized_by_Block/2_p-Block_Elements/Group_13%3A_The_Boron_Family/Chemistry_of_Boron

They said: Many boron compounds are electron-deficient, meaning that they lack an octet of electrons around the central boron atom. This deficiency is what accounts for boron being a strong Lewis acid, in that it can accept protons (H+ ions) in solution.  Boron-hydrogen compounds are referred to as boron hydrides, or boranes.

I googled it and they also said that borons can act as lewis acid.

If boron accepts protons then won't it be a lewis base?

Thanks

[Dan]

It looks like a mistake to me. The electron deficiency means B readily accepts lone pairs (not protons), making it a Lewis acid.