Lewis acidity 

https://doi.org/10.1351/goldbook.L03509
The thermodynamic tendency of a substrate to act as a Lewis acid. Comparative measures of this property are provided by the equilibrium constants for Lewis adduct formation of a series of Lewis acids with a common reference Lewis base.
See also: acceptor number (AN), electrophilicity
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1135 [Terms] [Paper]
Citation: 'Lewis acidity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.L03509 RIS BibTex EndNote
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Last revised: February 24, 2014