Traube’s rule

Traube's rule, formulated by German physical chemist Isidor Traube, relates the surface tension of capillary-active organic compounds to the number of hydrocarbon CH₂ groups in their molecules. This rule is a key concept in capillary chemistry, a field founded by Traube. His research also significantly advanced the understanding of critical temperature, osmosis, colloids, and surface tension. While strain theory, proposed by Adolf von Baeyer, discusses the stability of carbocyclic compounds based on bond angles and ring strain, and Trouton's rule relates molar heats of vaporization to boiling points, Traube's rule specifically addresses the relationship between molecular structure and surface tension in organic compounds.123