From:  Multiscale computational profiling of a promising carbapenemase inhibitor: from binding dynamics to quantum reactivity

 Global reactivity descriptor formula.

No.DescriptorFormula
1Electron affinity (A)A = –ELUMO [55]
2Ionisation potential (I)I = –EHOMO [55]
3Energy gap (ΔE)ΔE = ELUMO – EHOMO [55]
4Electronegativity (χ), chemical potential (μ)χ = (I + A)/2 = –μ [55]
5Chemical hardness (η)η = (I – A)/2 [55]
6Softness (S)S = 1/η [56]
7Electrophilicity (ω)ω = μ2/2η [57]

HOMO: highest occupied molecular orbital; LUMO: lowest unoccupied molecular orbital.