Dialuminum hexabromide
- Formula: Al2Br6
- Molecular weight: 533.387
- CAS Registry Number: 18898-34-5
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Gas phase thermochemistry 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -937.22 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1979 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 547.18 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1979 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 6000. |
|---|---|
| A | 181.7580 |
| B | 0.989826 |
| C | -0.268276 |
| D | 0.022896 |
| E | -1.308024 |
| F | -995.8380 |
| G | 759.4922 |
| H | -937.2160 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1979 |
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 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
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 10.97 | PE | Lappert, Pedley, et al., 1976 | Vertical value; LLK |
| 10.97 | PE | Lappert, Pedley, et al., 1974 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| Al2Br5+ | 12.3 ± 0.5 | Br | EI | Porter and Zeller, 1960 | RDSH |
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]
Lappert, Pedley, et al., 1976
Lappert, M.F.; Pedley, J.B.; Sharp, G.J.; Guest, M.F.,
Bonding studies of compounds of boron and elements of groups 3-5,
J. Chem. Soc. Faraday Trans. 2, 1976, 72, 539. [all data]
Lappert, Pedley, et al., 1974
Lappert, M.F.; Pedley, J.B.; Sharp, G.J.; Westwood, N.P.C.,
Bonding studies of compounds of boron and the Group III and IV elements. XII. Variable temperature HeI photoelectron spectra of Group III halides, 2MX3<=>M2X6(M=Al or Ga, X=Cl, Br, or I),
J. Electron Spectrosc. Relat. Phenom., 1974, 3, 237. [all data]
Porter and Zeller, 1960
Porter, R.F.; Zeller, E.E.,
Mass spectra of aluminum(III) halides and the heats of dissociation of Al2F6(g) and LiFAlF3(g),
J. Chem. Phys., 1960, 33, 858. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy 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
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