The Lewis Theory of Acids and Bases Optional

4 Distinguish between a Lewis acid and a Lewis base. Given the structural formula of a molecule or ion, state if it can be a Lewis acid, a Lewis base, or both, and explain why. [Pg.506]

5 Given the structural equation for a Lewis acid-base reaction, explain how or why it can be so classified. [Pg.506]

Co to http //now.brookscole.com/ cracolice5e and click Chemistty Interactive for the module Lewis Acid-Base Reactions. [Pg.506]

Look at the Lewis diagrams of the bases in Section 17.2. In each case the structural feature of the base that permits it to receive the proton is an unshared pair of electrons. A hydrogen ion has no electron to contribute to the bond, but it is able to accept an electron pair to form the bond. According to the Lewis theory of acids and bases, a Lewis base is an electron-pair donor, and a Lewis acid is an electron-pair acceptor. [Pg.506]

A Lewis acid is not limited to a hydrogen ion. A common example is boron trifluoride, which behaves as a Lewis acid by accepting an unshared pair of electrons from ammonia [Pg.506]

Big Chemical Encyclopedia