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
Ibis GS-730 Super Magic Ibis GS-730 Super Magic The Ibis GS-730 Super Magic is a Colombian STOL homebuilt aircraft that was designed and produced by Ibis Aircraft of Cali, introduced in 2007. When it was available the aircraft was supplied as a complete ready-to-fly-aircraft or as a kit for amateur construction. Production has been completed and as of 2011 the aircraft was no longer part of the company's product line. The GS-730 Super Magic is a development of the lighter Ibis GS-700 Magic and features a cantilever high-wing with a Robertson STOL kit, a two-seats-in-side-by-side configuration enclosed cabin with doors, fixed tricycle landing gear