Aluminum monobromide
- Formula: AlBr
- Molecular weight: 106.886
- CAS Registry Number: 22359-97-3
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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 | 3.800 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1979 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 57.268 | cal/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 (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 6000. |
|---|---|
| A | 8.858339 |
| B | 0.267125 |
| C | -0.092673 |
| D | 0.017884 |
| E | -0.037884 |
| F | 1.020600 |
| G | 67.69921 |
| H | 3.799960 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1979 |
Constants of diatomic molecules
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: Klaus P. Huber and Gerhard H. Herzberg
Data collected through November, 1975
| Symbol | Meaning |
|---|---|
| State | electronic state and / or symmetry symbol |
| Te | minimum electronic energy (cm-1) |
| ωe | vibrational constant – first term (cm-1) |
| ωexe | vibrational constant – second term (cm-1) |
| ωeye | vibrational constant – third term (cm-1) |
| Be | rotational constant in equilibrium position (cm-1) |
| αe | rotational constant – first term (cm-1) |
| γe | rotation-vibration interaction constant (cm-1) |
| De | centrifugal distortion constant (cm-1) |
| βe | rotational constant – first term, centrifugal force (cm-1) |
| re | internuclear distance (Å) |
| Trans. | observed transition(s) corresponding to electronic state |
| ν00 | position of 0-0 band (units noted in table) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A 1Π | 35879.5 | 297.2 HQ | 6.40 1 | -0.527 | 0.1555 2 | 0.00216 3 | -0.000175 | 0.00000018 4 | 2.322 | A ↔ X R | 35837.8 HQ | |
| ↳Crawford and Ffolliott, 1933; missing citation; Mahanti, 1935; missing citation; Jennergren, 1948 | ||||||||||||
| a 3Π1 | 23779.3 | 410.32 HQ | 1.75 | 0.164 5 | 0.001 | 2.26 | a → X V | 23795.3 HQ | ||||
| ↳Miescher, 1935; missing citation | ||||||||||||
| a 3Π0 | 23647 | 411.2 (Z) | 1.75 | a → X V | (23663) 6 (Z) | |||||||
| X 1Σ+ | 0 | 378.0 HQ | 1.28 | 0.15919713 | 0.000860449 | 2.030E-06 | 1.1285E-07 7 | -2.07E-10 | 2.294807 8 | |||
Notes
| 1 | This state may have a potential hump of ~ 0.20 eV Barrow, 1960, Barrow, 1961. |
| 2 | Predissociation for v > 3 According to Ram, Upadhya, et al., 1973 emission from v=2,3 breaks off at J=93,67, respectively. |
| 3 | missing note |
| 4 | Rapidly increasing with v. |
| 5 | Estimated from P and Q head separations. |
| 6 | P head at 23657.9 cm-1. |
| 7 | He = -1.119E-14. |
| 8 | From the corrected Be = 0.15920431. |
| 9 | Thermochemical value Barrow, 1961; 4.58 eV from predissociation in A 1Π. |
| 10 | For values of eqQ see Hoeft, Torring, et al., 1973. |
References
Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, 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]
Crawford and Ffolliott, 1933
Crawford, F.H.; Ffolliott, C.F.,
The band spectra of the halides of aluminum,
Phys. Rev., 1933, 44, 953. [all data]
Mahanti, 1935
Mahanti, P.C.,
The band spectrum of aluminum bromide,
Indian J. Phys., 1935, 9, 369. [all data]
Jennergren, 1948
Jennergren, C.G.,
Band spectrum of aluminum bromide (AlBr),
Ark. Mat. Astron. Fys., 1948, 35, 22, 1. [all data]
Miescher, 1935
Miescher, E.,
Bandenspektren von bor- und aluminium-halogeniden,
Helv. Phys. Acta, 1935, 8, 279. [all data]
Barrow, 1960
Barrow, R.F.,
Dissociation energies of the gaseous monohalides of boron, aluminium, gallium, indium, and thallium,
Trans. Faraday Soc., 1960, 56, 952. [all data]
Barrow, 1961
Barrow, R.F.,
Triplet bands of carbon monoxide: the system e3Σ - a3Π,
Nature (London), 1961, 189, 480. [all data]
Ram, Upadhya, et al., 1973
Ram, R.S.; Upadhya, K.N.; Rai, D.K.; Singh, J.,
Rotational analysis of the A1Π-X1Σ system of aluminum monobromide. Determination of dissociation energy by predissociation,
Opt. Pura Apl., 1973, 6, 38. [all data]
Hoeft, Torring, et al., 1973
Hoeft, J.; Torring, T.; Tiemann, E.,
Hyperfeinstruktur von AlCl und AlBr,
Z. Naturforsch. A, 1973, 28, 1066. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, 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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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