Diantimony

Formula: Sb₂
Molecular weight: 243.520
CAS Registry Number: 32679-33-7
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Constants of diatomic molecules

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1977

Symbols used in the table of constants
Symbol	Meaning
State	electronic state and / or symmetry symbol
T_e	minimum electronic energy (cm^-1)
ω_e	vibrational constant – first term (cm^-1)
ω_ex_e	vibrational constant – second term (cm^-1)
ω_ey_e	vibrational constant – third term (cm^-1)
B_e	rotational constant in equilibrium position (cm^-1)
α_e	rotational constant – first term (cm^-1)
γ_e	rotation-vibration interaction constant (cm^-1)
D_e	centrifugal distortion constant (cm^-1)
β_e	rotational constant – first term, centrifugal force (cm^-1)
r_e	internuclear distance (Å)
Trans.	observed transition(s) corresponding to electronic state
ν₀₀	position of 0-0 band (units noted in table)

Diatomic constants for ^(121,123)Sb₂
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
Fragments of other emission band systems 11900 - 13900 (V shaded), 23800 - 27800, 33300 - 34500 cm^-1 (R shaded).
↳Mrozowski and Santaram, 1967
U	(70194)	[272] 1 2									U ← X	70195
U	↳Donovan and Strachan, 1971
M	(63258)	[152] 3 H 4									M ← X	63199 H
M	↳Donovan and Strachan, 1971
I	(59142)	[210] 5 H 6									I ← X	59112 H
I	↳Donovan and Strachan, 1971
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
G	(53888)	[185] 7 H									G ← X R	53846 H
G	↳missing citation; Topouzkhanian, Sibai, et al., 1974; Sibai, Topouzkhanian, et al., 1975
E	(48645)	[228] 8 H 9									E ← X	48624 H
E	↳missing citation; Topouzkhanian, Sibai, et al., 1974
F	44780	226.0 10 H	1.17								(F ← X) (R)	44758 H
F	↳Nakamura and Shidel, 1935; Topouzkhanian, Sibai, et al., 1974
H	(44329)	[479] 11 H 12									H ← X V	(44433) 11 H
H	↳Sibai, Topouzkhanian, et al., 1975
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
D	(32087)	[209.6] 13 H									D ↔ X R	32057 H
D	↳Naude, 1935; Mrozowski and Santaram, 1967
B 0_u⁺	19068.9	218.0₈ H	0.53₇		B₂ = 0.044844 14			D₂ = 9.2E-9		r₂ = 2.4835	B ↔ X R	19043.0 H
B 0_u⁺	↳Almy, 1937; Almy and Schultz, 1937; Sfeila, Perdigon, et al., 1972
A	14991	217.2 H	0.44								A ↔ X R	14965 H
A	↳Almy, 1937; Almy and Schultz, 1937
X ¹Σ_g⁺	0	269.9₈ H	0.58₈		B₂ = 0.050447 14			D₂ = 9.5E-9		r₂ = 2.3415

Notes

ΔG(3/2) = 254.

Weak diffuse bands.

ΔG(3/2) = 149.

Three sharp bands.

ΔG(3/2)= 216,ΔG(5/2)= 217.

Weak system.

ΔG(3/2,5/2) = 195,205 Topouzkhanian, Sibai, et al., 1974; G(7/2) = 196 47. Bands of ¹²¹Sb₂ Sibai, Topouzkhanian, et al., 1975.

ΔG(3/2)= 216 Donovan and Strachan, 1971,ΔG(5/2)= 217 Donovan and Strachan, 1971, ΔG(7/2)= 220 Donovan and Strachan, 1971,ΔG(9/2)= 246 Donovan and Strachan, 1971 [flash photolysis of SbH₃]; Topouzkhanian, Sibai, et al., 1974 [high tempereature absorption] give no assignments.

Three bands appear diffuse.

Topouzkhanian, Sibai, et al., 1974 express doubts about the correctness of the analysis.

ΔG(3/2) = 541, ΔG(5/2)= 528, ΔG(7/2)= 477, ΔG(9/2)= 517, ΔG(11/2)= 548, ΔG(13/2)= 472. The constants assume v'=0,v"=2 for the first band at 43897 cm^-1.

Single progression, observed in ¹²¹Sb₂.

Levels up to v'=17 have been observed; the ΔG values are irregular due to perturbations and vary between 208 and 228. Nakamura and Shidel, 1935 give different assignments and constants.

Constants for ^121,123Sb₂ from the rotational analysis of the B → X 2-2 band by Sfeila, Perdigon, et al., 1972 who give also constants for ¹²¹Sb₂ and ¹²³Sb₂.

Thermochemical value (mass-spectrometry) DeMaria, Drowart, et al., 1959, Kordis and Gingerich, 1973.

References

Go To: Top, Constants of diatomic molecules, Notes

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]

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, Sibai, et al., 1974
Topouzkhanian, A.; Sibai, A.M.; d'Incan, J., Observation et analyse vibrationnelle de nouveauz systemes de bandes d'absorption de molecules lourdes dans l'ultraviolet lointain Cas de Sb₂ et Bi₂, Z. Naturforsch. A, 1974, 29, 436. [all data]

Sibai, Topouzkhanian, et al., 1975
Sibai, A.M.; Topouzkhanian, A.; d'Incan, J., Nouveau systeme de bandes dans le spectre d'absorption de la molecule d'antimoine isotopique (Sb₁₂₁-Sb₁₂₁) entre 1 840 et 2 350 Å, C.R. Acad. Sci. Paris, Ser. B, 1975, 280, 79. [all data]

Nakamura and Shidel, 1935
Nakamura, G.; Shidel, T., 3. The band spectra of elements of the fifth group, Jpn. J. Phys., 1935, 10, 11. [all data]

Naude, 1935
Naude, S.M., The absorption spectrum of the diatomic antimony molecule (Sb₂), South Afr. J. Sci., 1935, 32, 103-112. [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]

Almy and Schultz, 1937
Almy, G.M.; Schultz, H.A., Two new band systems of diatomic antimony, Phys. Rev., 1937, 51, 62. [all data]

Sfeila, Perdigon, et al., 1972
Sfeila, J.; Perdigon, P.; Martin, F.; Femelat, B., The B → X system of diatomic antimony, J. Mol. Spectrosc., 1972, 42, 239. [all data]

DeMaria, Drowart, et al., 1959
DeMaria, G.; Drowart, J.; Inghram, M.G., Thermodynamic study of InSb with a mass spectrometer, J. Chem. Phys., 1959, 31, 1076. [all data]

Kordis and Gingerich, 1973
Kordis, J.; Gingerich, K.A., Mass spectroscopic investigation of the equilibrium dissociation of gaseous Sb₂, Sb₃, Sb₄, SbP, SbP₃, and P₂, J. Chem. Phys., 1973, 58, 5141. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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