Английская Википедия:Effective molarity
Шаблон:Short description In chemistry, the effective molarity (denoted EM)[1] is defined as the ratio between the first-order rate constant of an intramolecular reaction and the second-order rate constant of the corresponding intermolecular reaction (kinetic effective molarity)[1][2] or the ratio between the equilibrium constant of an intramolecular reaction and the equilibrium constant of the corresponding intermolecular reaction (thermodynamic effective molarity).[1][3]
- <math>EM_{kinetic} = {k_{intramolecular} \over k_{intermolecular}}</math>
- <math>EM_{thermo} = {K_{intramolecular} \over K_{intermolecular}}</math>
EM has the dimension of concentration. High EM values always indicate greater ease of intramolecular processes over the corresponding intermolecular ones. Effective molarities can be used to get a deeper understanding of the effects of intramolecularity on reaction courses.[4] In last decades, the frequency of use of effective molarity in scientific literature has shown a marked decrease,Шаблон:Citation needed because this formalism is being progressively replaced by more importantШаблон:How physical quantities.Шаблон:Which
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