perchloric acid
- Formula: ClHO4
- Molecular weight: 100.459
- CAS Registry Number: 7601-90-3
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
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
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
ClO4- + = HClO4
By formula: ClO4- + H+ = HClO4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1255. ± 24. | kJ/mol | IMRB | Meyer and Kass, 2010 | gas phase |
| ΔrH° | 1220. ± 50. | kJ/mol | Acid | Marcus, 1987 | gas phase; Acidity seems too strong by ca. 10 kcal/mol. Other lattice energetics ( Mallouk, Rosenthal, et al., 1984, Finch, Gates, et al., 1977) are also too stable for anions. |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1200. ± 50. | kJ/mol | H-TS | Marcus, 1987 | gas phase; Acidity seems too strong by ca. 10 kcal/mol. Other lattice energetics ( Mallouk, Rosenthal, et al., 1984, Finch, Gates, et al., 1977) are also too stable for anions. |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, References, Notes
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
De-protonation reactions
ClO4- + = HClO4
By formula: ClO4- + H+ = HClO4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1255. ± 24. | kJ/mol | IMRB | Meyer and Kass, 2010 | gas phase |
| ΔrH° | 1220. ± 50. | kJ/mol | Acid | Marcus, 1987 | gas phase; Acidity seems too strong by ca. 10 kcal/mol. Other lattice energetics ( Mallouk, Rosenthal, et al., 1984, Finch, Gates, et al., 1977) are also too stable for anions. |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1200. ± 50. | kJ/mol | H-TS | Marcus, 1987 | gas phase; Acidity seems too strong by ca. 10 kcal/mol. Other lattice energetics ( Mallouk, Rosenthal, et al., 1984, Finch, Gates, et al., 1977) are also too stable for anions. |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Meyer and Kass, 2010
Meyer, M.M.; Kass, S.R.,
Experimental and Theoretical Gas-Phase Acidities, Bond Dissociation Energies, and Heats of Formation of HClOx, x=1-4,
J. Phys. Chem. A, 2010, 114, 12, 4086-4092, https://doi.org/10.1021/jp100888k
. [all data]
Marcus, 1987
Marcus, Y.,
The Thermodynamics of Solvation of Ions. 2. The Enthalpy of Hydration at 298.15K,
J. Chem. Soc. Farad. Trans. I, 1987, 83, 2, 339, https://doi.org/10.1039/f19878300339
. [all data]
Mallouk, Rosenthal, et al., 1984
Mallouk, T.E.; Rosenthal, G.L.; Muller, G.; Brusasco, R.; Bartlett, N.,
Fluoride ion affinities of GeF4 and BF4 from thermodynamic and structural data for (SF2)2GeF6, ClO2GeF5, and ClO2BF4,
Inorg. Chem., 1984, 23, 3167. [all data]
Finch, Gates, et al., 1977
Finch, A.; Gates, P.N.; Peake, S.J.,
Thermochemistry of polyhalides. III. Cesium and rubidium tetrachloroiodates,
J. Inorg. Nucl. Chem., 1977, 39, 2135. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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