Aluminum hydroxide
- Formula: AlHO
- Molecular weight: 43.9889
- CAS Registry Number: 20768-67-6
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Gas phase 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -43.000 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 51.728 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1967 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1000. | 1000. to 3000. | 3000. to 6000. |
|---|---|---|---|
| A | 0.713956 | 10.26867 | 14.42667 |
| B | 25.59441 | 3.327892 | 0.168581 |
| C | -21.40478 | -0.942048 | -0.023114 |
| D | 6.938863 | 0.097526 | 0.001150 |
| E | 0.089036 | -0.846788 | -3.994384 |
| F | -43.87643 | -48.34250 | -53.96750 |
| G | 46.35182 | 60.20124 | 61.66826 |
| H | -43.00000 | -43.00000 | -43.00000 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1967 | Data last reviewed in December, 1967 | Data last reviewed in December, 1967 |
Gas phase ion energetics data
Go To: Top, Gas phase 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
AlO- + = HAlO
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 367.9 ± 9.6 | kcal/mol | D-EA | Desai, Wu, et al., 1996 | gas phase |
| ΔrH° | 359.6 ± 4.1 | kcal/mol | G+TS | Damrauer, Krempp, et al., 1991 | gas phase; Between CF3CH2OH, pyrrole. Calculations imply that the acid is AlOH, not HAlO |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 360.7 ± 9.7 | kcal/mol | H-TS | Desai, Wu, et al., 1996 | gas phase |
| ΔrG° | 352.5 ± 4.0 | kcal/mol | IMRB | Damrauer, Krempp, et al., 1991 | gas phase; Between CF3CH2OH, pyrrole. Calculations imply that the acid is AlOH, not HAlO |
References
Go To: Top, Gas phase 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Desai, Wu, et al., 1996
Desai, S.R.; Wu, H.; Wang, L.-S.,
Vibrationally Resolved Photoelectron Spectroscopy of AlO- and AlO2-,
Int. J. Mass Spectrom. Ion Proc., 1996, 159, 1-3, 75, https://doi.org/10.1016/S0168-1176(96)04443-6
. [all data]
Damrauer, Krempp, et al., 1991
Damrauer, R.; Krempp, M.; Schmidt, M.W.; Gordon, M.S.,
Gas-Phase Chemistry of the Dimethylaluminum Oxide Ion and Related Aluminum Oxide Ions - Comparison of Reactivity with Siloxide Ions,
J. Am. Chem. Soc., 1991, 113, 7, 2393, https://doi.org/10.1021/ja00007a007
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions 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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