H2PO4 anion


Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Electron affinity of neutral species

EAneutral (eV) Method Reference Comment
4.570 ± 0.010LPESWang, Vorpagel, et al., 2001Vertical Detachment Energy = 5.06±0.05 eV

Protonation reactions

H2O4P- + Hydrogen cation = Phosphoric Acid

By formula: H2O4P- + H+ = H3O4P

Quantity Value Units Method Reference Comment
Deltar1383. ± 21.kJ/molG+TSMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)
Quantity Value Units Method Reference Comment
Deltar1351. ± 21.kJ/molIMRBMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Wang, Vorpagel, et al., 2001
Wang, X.B.; Vorpagel, E.R.; Yang, X.; Wang, L.S., Experimental and theoretical investigations of the stability, energetics, and structures, of H2PO4-, H2P2O72-, and H3P3O102- in the gas phase, J. Phys. Chem. A, 2001, 105, 45, 10468-10474, https://doi.org/10.1021/jp013244u . [all data]

Morris, Knighton, et al., 1997
Morris, R.A.; Knighton, W.B.; Viggiano, A.A.; Hoffman, B.C.; Schaeffer III, H.F., The Gas-phase Acidity of H3PO4, J. Chem. Phys., 1997, 106, 9, 3545, https://doi.org/10.1063/1.473465 . [all data]


Notes

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