A Bronsted-Lowry acid, like an Arrhenius acid, is a compound that breaks down to give an H+ in solution.
The Bronsted-Lowry base refers to any atom or ion capable of accepting or bonding to a free proton in solution.
- Methanol – CH3OH
- Formaldehyde – H2CO
- And water – H2O
A Lewis acid refers to an atom or molecule that accepts an electron pair.
Lewis Acid Examples in Organic Chemistry
- Borane – BH3 (hydroboration reaction)
- Aluminum Chloride – AlCl3 (electrophilic aromatic substitution reaction)
- Iron (III) Bromide – FeCl3 (electrophilic aromatic substitution reaction)
- and H+
Since the Lewis definition has to do with the transfer of electrons, a Lewis Base is an electron pair donor.