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
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
N (72137) [319]         N ← X 72082
Donovan and Strachan, 1971
M (69607) [365]         M ← X 69575
Donovan and Strachan, 1971
J           J ← X 66133
Donovan and Strachan, 1971
           J ← X 66015
Donovan and Strachan, 1971
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
I           I ← X 66542
Donovan and Strachan, 1971
           I ← X 65308
Donovan and Strachan, 1971
H (61726) [364] H         H ← X 1 R 61694 H
Donovan and Strachan, 1971
Unclassified absorption bands in the region 47000 - 55000 cm-1.
Topouzkhanian and Sibai, 1972
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
G (54586) [377] 2 H         G ← X 3 R 54560 H
Donovan and Strachan, 1971; Topouzkhanian and Sibai, 1972
F (52221) [386] H         F ← 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 (3Πu) 5           b → X R 42006
Almy and Kinzer, 1935; Almy, 1937; Kinzer and Almy, 1937
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
B 1Σu+ (40925) [243.6] 6 Z   [0.0712] 6     [2.5] B ↔ 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 1Σu+ (40349) [260.3] 7 8 Z   [0.07202] 7 8     [2.50] A ↔ 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 (3Πg) 1g 30818.8 336.7 H 1.36  0.09222 0.00033    2.2090 d → c 9 V 16185.6 H
missing citation; missing citation; Perdigon and d'Incan, 1970
           d → c 9 V 16348.4 H
missing citation; missing citation; Perdigon and d'Incan, 1970
           d → X 30772.4 H
missing citation; Perdigon and d'Incan, 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
a (3Σu-) 0u+ 24641.2 337.0 H 0.83  0.08664 0.00030    2.2790 (a → c) 10 V (10100)
missing citation
           a → X 11 R 24595 H
missing citation; Perdigon and d'Incan, 1970
e 19914.7 330.0 H 0.9        e → X R 19865 12 H
Perdigon and d'Incan, 1970
c 3Σu+ 0u- 14644.4 314.3 H 1.17  0.08491 0.00035    2.3021  
Perdigon and d'Incan, 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
c 3Σu+ 1u 14481.6 314.3 H 1.17  0.08471 13 0.00035    2.3036 c(1u) → X R 14424
Perdigon and d'Incan, 1970
X 1Σg+ 0 429.55 H 1.117 14 0.000139 0.10179 0.000333 -0.00000028   2.1026  

Notes

1System G ← X of Donovan and Strachan, 1971.
2Bands with v' ≥ 3 are diffuse.
3System E ← X of Donovan and Strachan, 1971.
4System f ← X of Donovan and Strachan, 1971.
5Only v=0 observed.
6Additional ΔG(v+1/2) and Bv values (v≤17) in Martin, Perdigon, et al., 1974. Strong perturbations.
7Additional ΔG(v+1/2) and Bv values (v≤17) 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' ≥ 10 are observed except those with v'= 14 Almy and Kinzer, 1935. In absorption bands with v' ≥ 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' ≥ 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 3Σu+ Perdigon and d'Incan, 1970.
10Strong system in the infrared Mrozowski and Santaram, 1967, not analyzed in detail.
11System D → X of Kinzer and Almy, 1937.
1219855 in Perdigon and d'Incan, 1970 appears to be erroneous.
13Ω-type doubling, Δνfe = (-)0.00018J(J+1).
14ωeze = -0.00001958.
15From the predissociation limit in A 1Σu+ 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 A1Σu+ (v = 2) and B1Σu+ (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 A1Σu+ (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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