Desmotropic constant

From equilibrium measurements L (desmotropic constant) Equilibrium constant... 

E is the so-called enol constant and measures the enolization capability of the diketo form ( = 1 for ethyl acetoacetate by definition). Thus, the so-called desmotropic constant L is a measure of the enoHzation power of the solvent. By definition, the values of L are equal to the equilibrium constants of ethyl acetoacetate E = 1), determined in different solvents [24]. This desmotropic constant seems to be the first empirical solvent parameter. It describes the relative solvation power of a solvent for diketo and enol forms of 1,3-dicarbonyl compounds. It was measured only for a few solvents and was soon forgotten. 

L Desmotropic constant (enol/diketo ratio of ethyl acetoacetate in the solvent) Meyer (Meyer and Hopff, 1921)... 

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