Preferred Label : electronegativity;
IUPAC definition : Concept introduced by L. Pauling as the power of an atom to attract electrons to itself.
There are several definitions of this quantity. According to Mulliken it is the average
of the ionization energy and electron affinity of an atom, but more frequently a relative
scale due to Pauling is used where dimensionless relative electronegativity differences
are defined on the basis of bond dissociation energies, E d, expressed in electronvolts:
\[\chi _{{r}}\left({A}\right)- \chi _{{r}}\left({B}\right) \left({eV}\right) {-\frac{1}{2}}\
\sqrt{E_{{d}}\left({AB}\right)- \frac{1}{2}\ [E_{{d}}\left({AA}\right) E_{{d}}\left({BB}\right)]}\]
The scale is chosen so as to make the relative electronegativity of hydrogen χ r
2.1. The sign of the square root was chosen intuitively by Pauling.;
Origin ID : E01990;
See also
Concept introduced by L. Pauling as the power of an atom to attract electrons to itself.
There are several definitions of this quantity. According to Mulliken it is the average
of the ionization energy and electron affinity of an atom, but more frequently a relative
scale due to Pauling is used where dimensionless relative electronegativity differences
are defined on the basis of bond dissociation energies, E d, expressed in electronvolts:
\[\chi _{{r}}\left({A}\right)- \chi _{{r}}\left({B}\right) \left({eV}\right) {-\frac{1}{2}}\
\sqrt{E_{{d}}\left({AB}\right)- \frac{1}{2}\ [E_{{d}}\left({AA}\right) E_{{d}}\left({BB}\right)]}\]
The scale is chosen so as to make the relative electronegativity of hydrogen χ r
2.1. The sign of the square root was chosen intuitively by Pauling.
