Electronegativity	$\chi =-\frac{1}{2}(I+\left(\mathbf{a}\right)\approx \frac{1}{2}({ϵ}_L+{ϵ}_H)$
Global hardness	$\eta =(I-\left(\mathbf{a}\right)\approx ({ϵ}_L-{ϵ}_H)$
Electrophilicity	$\omega$ = $\frac{{\mu }^2}{2\eta }=\frac{(I+{\left(\mathbf{a}\right)}^2}{4(I-(\mathbf{a})}\approx \frac{{({ϵ}_L+{ϵ}_H)}^2}{4({ϵ}_L-{ϵ}_H)}$
Electrodonating power	${\omega }^{-}$ = $\frac{(3I+{\left(\mathbf{a}\right)}^2}{16(I-(\mathbf{a})}\approx \frac{{(3{ϵ}_H+{ϵ}_L)}^2}{16\eta }$
Electroaccepting power	${\omega }^{+}$ = $\frac{(I+3{\left(\mathbf{a}\right)}^2}{16(I-(\mathbf{a})}\approx \frac{{({ϵ}_H+3{ϵ}_L)}^2}{16\eta }$
Net electrophilicity	$\Delta {\omega }^{\pm }={\omega }^{+}-(-{\omega }^{-})={\omega }^{+}+{\omega }^{-}$