Subject: Lewis Acids and Bases

Lewis Acid:     electron-pair acceptor

	Anything that is e- deficient is a Lewis acid:

		H+, BF3, AlCl3, SO2, SO3, CO2, NO2, etc.
		(multiple bonds between S, C or N and O).


Lewis Base:     electron-pair donor

	Anything that has at least 1 unshared e- pair could be
		a Lewis base.  So certainly things with a negative
		charge but also neutral molecules.

		F-, OH-, :NH3, H2O, etc.