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
Blossom, Bubbles and Buttercup mysterious substance called "Chemical X" into the mixture, creating, instead of the "perfect little girl", three girls (each possessing one of the above elements dominating her personality), and granting all three superpowers including flight, superhuman strength, super speed, near invulnerability, x-ray vision, super senses, heat vision, energy projection, invisibility, and control over lightning. In the original pilot, the accidental substance was a can of "Whoopass", which was replaced by "Chemical X" in the aired version. The three girls all have oval-shaped heads, abnormally large eyes (inspired by Margaret Keane's art), stubby arms and legs, and lack noses, ears, fingers, necks,