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
Chemical endangerment Chemical endangerment Chemical endangerment is the crime of exposing a child to a controlled substance or an environment in which it is produced. It was added to the Alabama legal code in 2006, with the intention of protecting children from methamphetamine laboratories. Since then, it has been used to prosecute women who give birth to children that test positive for harmful drugs and also THC, the active ingredient in marijuana. Section 26-15-3.2 of the Alabama legal code discusses the crime of "chemical endangerment of exposing a child to an environment in which controlled substances are produced or distributed." It is