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Arsenic dimer


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 January, 1976

Symbols used in the table of constants
SymbolMeaning
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 75As2
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
N (72137) [319]         N larrow X 72082
Donovan and Strachan, 1971
M (69607) [365]         M larrow X 69575
Donovan and Strachan, 1971
J           J larrow X 66133
Donovan and Strachan, 1971
           J larrow X 66015
Donovan and Strachan, 1971
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
I           I larrow X 66542
Donovan and Strachan, 1971
           I larrow X 65308
Donovan and Strachan, 1971
H (61726) [364] H         H larrow X 1 R 61694 H
Donovan and Strachan, 1971
Unclassified absorption bands in the region 47000 - 55000 cm-1.
Topouzkhanian and Sibai, 1972
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
G (54586) [377] 2 H         G larrow X 3 R 54560 H
Donovan and Strachan, 1971; Topouzkhanian and Sibai, 1972
F (52221) [386] H         F larrow X 4 R 52200 H
Donovan and Strachan, 1971; Topouzkhanian and Sibai, 1972
Fragments of other electronic states in the region 42400 - 44500 cm-1.
Sibai, Perdigon, et al., 1974
b (3Piu) 5           b rarrow X R 42006
Almy and Kinzer, 1935; Almy, 1937; Kinzer and Almy, 1937
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
B 1Sigmau+ (40925) [243.6] 6 Z   [0.0712] 6     [2.5] B lrarrow X R 40832.2 Z
Gibson and Macfarlane, 1934; Almy and Kinzer, 1935; missing citation; Perdigon and d'Incan, 1970; Perdigon, Martin, et al., 1970; Martin, Perdigon, et al., 1974
A 1Sigmau+ (40349) [260.3] 7 8 Z   [0.07202] 7 8     [2.50] A lrarrow X R 40265 Z
Gibson and Macfarlane, 1934; Almy and Kinzer, 1935; missing citation; Perdigon and d'Incan, 1970; Perdigon, Martin, et al., 1970; Topouzkhanian and Sibai, 1972; Martin, Perdigon, et al., 1974; Sibai, Perdigon, et al., 1974; Martin, Figuet, et al., 1975
d (3Pig) 1g 30818.8 336.7 H 1.36  0.09222 0.00033    2.2090 d rarrow c 9 V 16185.6 H
missing citation; missing citation; Perdigon and d'Incan, 1970
           d rarrow c 9 V 16348.4 H
missing citation; missing citation; Perdigon and d'Incan, 1970
           d rarrow X 30772.4 H
missing citation; Perdigon and d'Incan, 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
a (3Sigmau-) 0u+ 24641.2 337.0 H 0.83  0.08664 0.00030    2.2790 (a rarrow c) 10 V (10100)
missing citation
           a rarrow X 11 R 24595 H
missing citation; Perdigon and d'Incan, 1970
e 19914.7 330.0 H 0.9        e rarrow X R 19865 12 H
Perdigon and d'Incan, 1970
c 3Sigmau+ 0u- 14644.4 314.3 H 1.17  0.08491 0.00035    2.3021  
Perdigon and d'Incan, 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
c 3Sigmau+ 1u 14481.6 314.3 H 1.17  0.08471 13 0.00035    2.3036 c(1u) rarrow X R 14424
Perdigon and d'Incan, 1970
X 1Sigmag+ 0 429.55 H 1.117 14 0.000139 0.10179 0.000333 -0.00000028   2.1026  

Notes

1System G larrow X of Donovan and Strachan, 1971.
2Bands with v' geq 3 are diffuse.
3System E larrow X of Donovan and Strachan, 1971.
4System f larrow X of Donovan and Strachan, 1971.
5Only v=0 observed.
6Additional DeltaG(v+1/2) and Bv values (vleq17) in Martin, Perdigon, et al., 1974. Strong perturbations.
7Additional DeltaG(v+1/2) and Bv values (vleq17) in Martin, Perdigon, et al., 1974, Sibai, Perdigon, et al., 1974, Martin, Figuet, et al., 1975. Strong perturbations produced by interaction with the B and, possibly, other states.
8In emission no bands with v' geq 10 are observed except those with v'= 14 Almy and Kinzer, 1935. In absorption bands with v' geq 10 are observed Topouzkhanian and Sibai, 1972, Sibai, Perdigon, et al., 1974 but the lines in them are broad except those with v'= 14 which are sharp. The line width varies greatly as a function of J in bands with v' geq 10. There is clearly a predissociation limit at 42700 ± 100 cm-1.
9Originally Kinzer and Almy, 1937 attributed to As2+. Recognized as being due to neutral As2 by Mrozowski and Santaram, 1967. The lower states are the two case "c" components of c 3Sigmau+ Perdigon and d'Incan, 1970.
10Strong system in the infrared Mrozowski and Santaram, 1967, not analyzed in detail.
11System D rarrow X of Kinzer and Almy, 1937.
1219855 in Perdigon and d'Incan, 1970 appears to be erroneous.
13Omega-type doubling, Deltanufe = (-)0.00018J(J+1).
14omegaeze = -0.00001958.
15From the predissociation limit in A 1Sigmau+ assuming dissociation into 4S + 2D without kinetic energy Kinzer and Almy, 1937. Extrapolation of the ground state vibrational levels (observed to v=70, i.e., 80% of D00 ) gives 3.93 eV Almy, 1937 Kinzer and Almy, 1937.

References

Go To: Top, 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.

Donovan and Strachan, 1971
Donovan, R.J.; Strachan, P., Vacuum U.-V. spectra of transient molecules and radicals, J. Chem. Soc. Faraday Trans., 1971, 67, 3407. [all data]

Topouzkhanian and Sibai, 1972
Topouzkhanian, A.; Sibai, A.M., Spectres d'absorption dans l'ultraviolet du vide de vapeurs d'arsenic diatomique, Spectrochim. Acta, 1972, 28, 2197. [all data]

Sibai, Perdigon, et al., 1974
Sibai, A.M.; Perdigon, P.; Topouzkhanian, A., Absorption spectrum of As2. Further analysis of the A --> X system and observation of new electronic states, Z. Naturforsch. A, 1974, 29, 429. [all data]

Almy and Kinzer, 1935
Almy, G.M.; Kinzer, G.D., The emission spectrum of diatomic arsenic, Phys. Rev., 1935, 47, 721. [all data]

Almy, 1937
Almy, G.M., Spectra of diatomic molecules of elements of the fifth group, J. Phys. Chem., 1937, 41, 47. [all data]

Kinzer and Almy, 1937
Kinzer, G.D.; Almy, G.M., The emission spectrum of diatomic arsenic. II, Phys. Rev., 1937, 52, 814. [all data]

Gibson and Macfarlane, 1934
Gibson, G.E.; Macfarlane, A., The absorption spectrum of arsenic, Phys. Rev., 1934, 46, 1059. [all data]

Perdigon and d'Incan, 1970
Perdigon, P.; d'Incan, J., Le spectre electronique de la molecule As2, Can. J. Phys., 1970, 48, 1140. [all data]

Perdigon, Martin, et al., 1970
Perdigon, P.; Martin, F.; d'Incan, J., The mutual perturbations of A1«SIGMA»u+ (v = 2) and B1«SIGMA»u+ (v = 0) levels of As2 molecule, J. Mol. Spectrosc., 1970, 36, 341. [all data]

Martin, Perdigon, et al., 1974
Martin, F.; Perdigon, P.; d'Incan, J., An extensive rotational analysis of A --> X and B --> X systems in the emission spectrum of As2 molecule, J. Mol. Spectrosc., 1974, 50, 45. [all data]

Martin, Figuet, et al., 1975
Martin, F.; Figuet, J.; Perdigon, P., Evidence for bands arising from A1«SIGMA»u+ (v = 3) level in the spectrum of As2, J. Mol. Spectrosc., 1975, 57, 319. [all data]

Mrozowski and Santaram, 1967
Mrozowski, S.; Santaram, C., Electronic spectra of P2, As2, and Sb2 molecules, J. Opt. Soc. Am., 1967, 57, 522. [all data]


Notes

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