Lewis acids and bases Lewis acids and bases A Lewis acid is a chemical species that contains an empty orbital which is capable of accepting an electron pair from a Lewis base to form a Lewis adduct. A Lewis base, then, is any species that has a filled orbital containing an electron pair which is not involved in bonding but may form a dative bond with a Lewis acid to form a Lewis adduct. For example, NH is a Lewis base, because it can donate its lone pair of electrons. Trimethylborane (MeB) is a Lewis acid as it is capable of accepting a lone
Orlando Magic his option for the 2010–11 season. They did the same for general manager Otis Smith, which would keep him in that position through the 2011–12 season. The Magic were without Rashard Lewis for the first 10 games of the 2009–10 season. Lewis tested positive for an elevated testosterone level that was caused by an over-the-counter supplement containing a substance banned by the league. To make matters worse, Vince Carter suffered a left ankle injury in just the second game of the season. Carter's injury turned out to be not too serious, but caused him to miss the next five games.