Lewis acids and bases ionic bonding. Classically, the term "Lewis acid" is restricted to trigonal planar species with an empty p orbital, such as BR where R can be an organic substituent or a halide. For the purposes of discussion, even complex compounds such as EtAlCl and AlCl are treated as trigonal planar Lewis acids. Metal ions such as Na, Mg, and Ce, which are invariably complexed with additional ligands, are often sources of coordinatively unsaturated derivatives that form Lewis adducts upon reaction with a Lewis base[citation needed]. Other reactions might simply be referred to as "acid-catalyzed" reactions. Some compounds, such as HO, are
Jeff Lewis (writer) Strikes Back" - Nominee<br> 1983: "Hill Street Blues" - David Milch, Jeffrey Lewis, Michael Wagner for "Gung Ho!" - Nominee<br> "'1984: "Hill Street Blues" - Teleplay by Jeffrey Lewis, Michael Wagner, Karen Hall, Mark Frost Story by Steven Bochco, Jeffrey Lewis, David Milch for "Grace Under Pressure"<br> 1984: "Hill Street Blues" - Teleplay by Jeffrey Lewis, Michael Wagner, David Milch, Mark Frost Story by Steven Bochco, Jeffrey Lewis, David Milch for "Parting Is Such Sweep Sorrow" - Nominee<br> 1985: "Hill Street Blues" - Teleplay by David Milch & Roger Director Story by Steven Bochco, Jeffrey Lewis, David Milch for "Watt