Gallium monochloride

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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1976

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 69Ga35Cl
Continuous absorption at 41200 and 47600 cm-1.
Miescher and Wehrli, 1933; Levin and Winans, 1951
C 1Pi (40261) [120] 1 H         C larrow X R 40139 H
Miescher and Wehrli, 1933; missing citation
B 3Pi1 29859.4 395.3 H 2.5  [0.15686] 2     [2.1523] B lrarrow X V 29874.03 2 Z
Miescher and Wehrli, 1933; missing citation
A 3Pi0+ 29527.2 395.3 H 2.3 3 0.015 [0.15779] 4     [2.1460] A lrarrow X V (29541.9) (Z)
Miescher and Wehrli, 1933; missing citation
X 1Sigma+ 0 365.3 5 H 1.2  0.1499045 0.0007936 6 0.0000018 (1.01E-7) 7  2.201690 8  
Barrett and Mandel, 1958; Tiemann, Grasshoff, et al., 1972


1Bands with v'=1 are diffuse on account of predissociation.
2Recalculated by Bartky, 1960 from data in Levin and Winans, 1951.
3missing note
4B0' - B0" redetermined from the differences between consecutive lines in the R and P branches measured by Levin and Winans, 1951.
5DeltaG(1/2) = 363.32 Bartky, 1960 from band origins Bartky, 1960.
6missing note
7Calculated from 4Be3/omegae2.
8Microwave sp. 10
9From spectroscopic evidence concerning C 1Pi, see Barrow, 1960. Good agreement with the flame photometric value of Bulewicz, Phillips, et al., 1961.
10eqQ(69Ga) = -[92.40 - 0.68(v+1/2)] MHz, eqQ(35Cl) = -[13.20 + 0.20(v+1/2)] MHz Tiemann, Grasshoff, et al., 1972.


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

Miescher and Wehrli, 1933
Miescher, E.; Wehrli, M., Die spektren der galliumhalogenide, Helv. Phys. Acta, 1933, 6, 458. [all data]

Levin and Winans, 1951
Levin, F.K.; Winans, J.G., The absorption spectrum of GaCl, Phys. Rev., 1951, 84, 431. [all data]

Barrett and Mandel, 1958
Barrett, A.H.; Mandel, M., Microwave spectra of the Tl, In, and Ga monohalides, Phys. Rev., 1958, 109, 1572. [all data]

Tiemann, Grasshoff, et al., 1972
Tiemann, E.; Grasshoff, M.; Hoeft, J., Hyperfeinstruktur im Rotationsspektrum des GaCl, Z. Naturforsch. A, 1972, 27, 753. [all data]

Bartky, 1960
Bartky, I.R., Recalculation of the molecular constants of Ga69Cl35, J. Mol. Spectrosc., 1960, 5, 206. [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]

Bulewicz, Phillips, et al., 1961
Bulewicz, E.M.; Phillips, L.F.; Sugden, T.M., Determination of dissociation constants and heats of formation of simple molecules by flame photometry. Part 8. Stabilities of the gaseous diatomic halides of certain metals, Trans. Faraday Soc., 1961, 57, 921. [all data]


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