Lewisnummer

Lewisnummer refers to a concept in chemistry, specifically related to the bonding between a Lewis acid and a Lewis base. A Lewis acid is an electron-pair acceptor, while a Lewis base is an electron-pair donor. When a Lewis acid and a Lewis base interact, they form a coordinate covalent bond, also known as a dative covalent bond. This bond is characterized by the fact that both electrons in the shared pair originate from the Lewis base.

The term "Lewisnummer" itself is not a standard or widely recognized chemical term in English-language literature. It may be a term used in a specific regional or academic context, or perhaps a translation from another language. In standard chemical nomenclature, the interaction is described as the formation of an adduct or a complex between the Lewis acid and the Lewis base. The strength of the interaction is often quantified by stability constants or equilibrium constants for the formation of the adduct. Understanding Lewis acid-base theory and the formation of these species is fundamental to many areas of chemistry, including organic chemistry, inorganic chemistry, and coordination chemistry. Examples include the reaction of ammonia (a Lewis base) with boron trifluoride (a Lewis acid) to form H3N→BF3.