Formula

E = (1-4D) ke²/R

D = [ 1 – E R / ke² ] / 4

H-ion

D= [ 1 – (-2.7 eV) (0.106 nm) / (1.44 eV-nm ) ] / 4 = 0.2997

H-molecule

D = [1 – (-4.5 eV) (.074 nm) / (1.44 eV-nm ) ] / 4 = 0.3078