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. 2010 Aug 3;11(3):1212–1222. doi: 10.1208/s12249-010-9499-4

Table II.

Calculated Molecular Descriptors of Counterions Using DFT

Counterion (acid) A (eV) I (eV) η (eV) S (eV−1) μ (eV) ω (eV)
Phosphoric 0.012 10.498 10.486 0.095 −5.255 1.317
Citric 0.426 9.507 9.081 0.110 −4.967 1.358
Benzenesulfonic 0.353 9.569 9.216 0.109 −4.961 1.335
Oxalic 0.714 10.407 9.692 0.103 −5.561 1.595
Sulfuric 0.771 11.359 10.587 0.094 −6.065 1.737
Ethanesulfonic 0.103 12.134 12.032 0.083 −6.119 1.556
Naphthalenesulfonic 0.945 8.306 7.361 0.136 −4.625 1.453
Toluenesulfonic 0.305 9.122 8.817 0.113 −4.713 1.260
Formic −0.986 11.100 12.086 0.083 −5.057 1.058
Methanesulfonic 0.321 10.769 10.448 0.096 −5.545 1.471
HCl −0.486 12.765 13.251 0.075 −6.139 1.422