Aluminum difluoride
- Formula: AlF2
- Molecular weight: 64.9783450
- CAS Registry Number: 13569-23-8
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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 | -166.00 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1976 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 63.145 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1976 |
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.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. to 2000. | 2000. to 6000. |
|---|---|---|
| A | 11.24060 | 15.09560 |
| B | 4.690271 | -0.717936 |
| C | -2.953000 | 0.141589 |
| D | 0.630050 | -0.006479 |
| E | -0.129184 | -1.532401 |
| F | -169.9690 | -173.2680 |
| G | 74.74849 | 78.22710 |
| H | -166.0000 | -166.0000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1976 | Data last reviewed in June, 1976 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to AlF2+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 2.25 ± 0.13 | TDEq | Srivastava, Uy, et al., 1974 | EA: 26.5 kcal < EA(F), new EA(F) data used; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 10. | EI | Uy, Srivastava, et al., 1972 | LLK |
| 9. ± 1. | EI | Ehlert and Margrave, 1964 | RDSH |
Vibrational and/or electronic energy levels
Go To: Top, Gas phase thermochemistry data, 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: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a1 | 1 | Sym. stretch | 755.3 | Ar | IR | Hassanzadeh, Citra, et al., 1996 Davlyatshin and Osin, 1997 | |
| 2 | Bend | 253.7 | Ar | IR | Davlyatshin and Osin, 1997 | ||
| b2 | 3 | Asym. stretch | 887.5 | Ar | IR | Hassanzadeh, Citra, et al., 1996 Davlyatshin and Osin, 1997 | |
Additional references: Jacox, 1998, page 192; Jacox, 2003, page 134
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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]
Srivastava, Uy, et al., 1974
Srivastava, R.D.; Uy, O.M.; Farber, M.,
Experimental determination of heats of formation of negative ions and electron affinities of several boron and aluminum fluorides,
J. Chem. Soc. Faraday Trans. 1, 1974, 70, 1033. [all data]
Uy, Srivastava, et al., 1972
Uy, O.M.; Srivastava, R.D.; Farber, M.,
Mass spectrometric determination of the heats of formation of the gaseous molecules AlOF2 and AlF2,
High Temp. Sci., 1972, 4, 227. [all data]
Ehlert and Margrave, 1964
Ehlert, T.C.; Margrave, J.L.,
The heat of atomization of aluminum difluoride,
J. Am. Chem. Soc., 1964, 86, 3901. [all data]
Hassanzadeh, Citra, et al., 1996
Hassanzadeh, P.; Citra, A.; Andrews, L.; Neurock, M.,
Laser-Evaporated Aluminum Atom Reactions with Halogen Molecules. Infrared Spectra of AlX,
J. Phys. Chem., 1996, 100, 18, 7317, https://doi.org/10.1021/jp953065a
. [all data]
Davlyatshin and Osin, 1997
Davlyatshin, D.I.; Osin, S.B.,
Vestn. Mosk. Univ., 1997, Ser. 2: Khim. 38, 306. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
EA Electron affinity S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.