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Aluminum monobromide

Constants of diatomic molecules

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: K.P. Huber and G. Herzberg

Data collected through November, 1975

Symbols used in the table of constants
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)
Diatomic constants for 27Al79Br
A 1Pi 35879.5 297.2 HQ 6.40 1 -0.527 0.1555 2 0.00216 3 -0.000175 0.00000018 4  2.322 A lrarrow X R 35837.8 HQ
Crawford and Ffolliott, 1933; missing citation; Mahanti, 1935; missing citation; Jennergren, 1948
a 3Pi1 23779.3 410.32 HQ 1.75  0.164 5 0.001    2.26 a rarrow X V 23795.3 HQ
Miescher, 1935; missing citation
a 3Pi0 23647 411.2 (Z) 1.75        a rarrow X V (23663) 6 (Z)
X 1Sigma+ 0 378.0 HQ 1.28  0.15919713 0.000860449 2.030E-06 1.1285E-07 7 -2.07E-10 2.294807 8  


1This state may have a potential hump of ~ 0.20 eV Barrow, 1960, Barrow, 1961.
2Predissociation for v > 3 According to Ram, Upadhya, et al., 1973 emission from v=2,3 breaks off at J=93,67, respectively.
3missing note
4Rapidly increasing with v.
5Estimated from P and Q head separations.
6P head at 23657.9 cm-1.
7He = -1.119E-14.
8From the corrected Be = 0.15920431.
9Thermochemical value Barrow, 1961; 4.58 eV from predissociation in A 1Pi.
10For values of eqQ see Hoeft, Torring, et al., 1973.


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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 e3«SIGMA» - a3«PI», 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 A1«PI»-X1«SIGMA» 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]


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