donicity 

Synonym: donor number DN (misnomer)
https://doi.org/10.1351/goldbook.08164
Quantitative experimental measure of the Lewis basicity of a molecule B, expressed as the negative enthalpy of the formation of the 1:1 complex B⋅SbClA5.
Note:
Donicity is often used as a measure of a solvent’s basicity.
Source:
PAC, 2022, 94, 353. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)) on page 406 [Terms] [Paper]
Citation: 'donicity' 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.08164 RIS BibTex EndNote
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