Preferred Label : Dimroth–Reichardt ET parameter;
IUPAC definition : A measure of the ionizing power (loosely polarity) of a solvent, based on the maximum
wavenumber of the longest wavelength electronic absorption band of: in a given solvent.
ET, called ET(30) by its originators, is given by: \[E_{{T}} 2.859\times 10 {-3}\
\nu 2.859\times 10 {4}\ \lambda {-1}\] where ET is in kcal mol-1, ν is in cm-1
and λ is in nm. The so-called normalized ETN scale is defined as: \[E_{{T}} {{N}}
\frac{E_{{T}}\left({solvent}\right)- E_{{T}}\left({Si}{Me}_{4}\right)}{E_{{T}}\left({water}\right)-
E_{{T}}\left({Si}{Me}_{4}\right)} \frac{E_{{T}}\left({solvent}\right)- 30.7}{32.4}\];
Origin ID : D01746;
See also
A measure of the ionizing power (loosely polarity) of a solvent, based on the maximum
wavenumber of the longest wavelength electronic absorption band of: in a given solvent.
ET, called ET(30) by its originators, is given by: \[E_{{T}} 2.859\times 10 {-3}\
\nu 2.859\times 10 {4}\ \lambda {-1}\] where ET is in kcal mol-1, ν is in cm-1
and λ is in nm. The so-called normalized ETN scale is defined as: \[E_{{T}} {{N}}
\frac{E_{{T}}\left({solvent}\right)- E_{{T}}\left({Si}{Me}_{4}\right)}{E_{{T}}\left({water}\right)-
E_{{T}}\left({Si}{Me}_{4}\right)} \frac{E_{{T}}\left({solvent}\right)- 30.7}{32.4}\]
