(from the article `chromatography`) ...electron-pair-accepting hydrogen atoms, and (5) acid-base interactions in the Lewis acid-base sensei.e., the affinity of electron-accepting ... ...known as Lewis acid-base reactions. The general form of Lewis acid-base reactions involves the formation of a covalent bond between a species that... Found on http://www.britannica.com/eb/a-z/l/41
A molecular entity (and the corresponding chemical species ) able to provide a pair of electrons and thus capable of coordination to a Lewis acid , thereby producing a Lewis adduct . Found on http://www.chem.qmul.ac.uk/iupac/gtpoc/KL.html