Preferred Label : relative hardness;
IUPAC definition : The difference between the values of the absolute hardnesses (η) of a given molecule
and the corresponding reference structure (η a): η r η- η a. The values of relative
hardnesses correlate well with the resonance energies of cyclic compounds and may
be used as an index of aromaticity.;
Origin ID : RT07092;
See also
The difference between the values of the absolute hardnesses (η) of a given molecule
and the corresponding reference structure (η a): η r η- η a. The values of relative
hardnesses correlate well with the resonance energies of cyclic compounds and may
be used as an index of aromaticity.