Tin monofluoride

Formula: FSn
Molecular weight: 137.708
CAS Registry Number: 13966-74-0
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Gas phase ion energetics data

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Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to FSn⁺ (ion structure unspecified)

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.5 ± 0.3	EI	Zmbov, Hastie, et al., 1968	RDSH
7.8 ± 0.3	EI	Zmbov, Hastie, et al., 1968	RDSH
9.0 ± 0.5	EI	Hastie, Zmbov, et al., 1968	RDSH
7.04	S	Johns and Barrow, 1958	RDSH

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
Sn⁺	15.5 ± 0.3	F	EI	Hastie, Zmbov, et al., 1968	RDSH

Constants of diatomic molecules

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

Data collected through September, 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 ¹¹⁸Sn¹⁹F
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
Strong absorption continua with maxima at 41000 and 53000 cm^-1.
↳Jenkins and Rochester, 1937
G ²Δ	(46427)	[609.₉] 1 H			[0.2870] 2			[0.225E-₆] 2		[1.895]	G ↔ X V	44121.9 Z
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
	(46338)	[609.₉] 1 H			[0.2870] 2			[0.225E-₆] 2		[1.895]	G ↔ X V	46351.8 1 H
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
F (²Σ)	45500.5	688.2 $dH	4.6₅								F → A V	25497.0
	↳Barrow, Butler, et al., 1959
											F ↔ X V	43233.1
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
											F ↔ X V	45552.6 3 H
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
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
E	42137.1	677.0 3 H	3.0								E ↔ X V	39864.5 3 H
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
	41856.1	677.0 3 H	3.0								E ↔ X V	41903.0 3 H
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959
D	(41341)	[622] 3 H									D → X V	39041.9
	↳Barrow, Butler, et al., 1959
	(41341)	[622] 3 H									D → X V	41361.4 3 H
	↳Barrow, Butler, et al., 1959
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
C ²Δ	40831	[600] 3 H	(5.4)		[0.2856] 2			[0.223E-₆] 2		[1.899]	C ↔ X V	38524.7 Z
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959; Uzikov and Kuzyakov, 1968
	40760	[600] 3 H	(5.4)		[0.2856] 2			[0.223E-₆] 2		[1.899]	C ↔ X V	40772.8 3 H
	↳Jenkins and Rochester, 1937; Barrow, Butler, et al., 1959; Uzikov and Kuzyakov, 1968
B ²Σ⁺	34109.0	677.6 3 H	2.74		[0.2896]			[0.246E-₆]		[1.886]	B → A V	14100.9
	↳Barrow, Butler, et al., 1959
											B ↔ X V	31836.97 Z
	↳missing citation; Barrow, Kopp, et al., 1962
											B ↔ X V	(34156.09)
	↳missing citation; Barrow, Kopp, et al., 1962
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
B' (⁴Σ^-) 4											B' → X V	33039.8 H
B' (⁴Σ^-) 4	↳Barrow, Butler, et al., 1959
A ²Σ⁺	20136.9	[415.76] Z	2.20₆ H		0.2471 5	0.0026		[0.382E-₆] 6		2.042	A → X 7 R	17736.08 Z
	↳missing citation; Barrow, Kopp, et al., 1962; missing citation
	20136.9	[415.76] Z	2.20₆ H		0.2471 5	0.0026		[0.382E-₆] 6		2.042	A → X 7 R	20055.58 Z
	↳missing citation; Barrow, Kopp, et al., 1962; missing citation
X ²Π_3/2	2316.9	[582.67] Z	2.82 H		0.2738	0.0014		[0.22₅E-6] 8		1.940
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
X ²Π_1/2	0	[577.6₄] Z	2.69 H		0.2727 9 10	0.0014		[0.262E-₆] 11		1.944

Notes

From Barrow, Butler, et al., 1959 (natural isotopic mixture); Jenkins and Rochester, 1937 give ΔG(1/2) = 607 and 598 cm^-1 Jenkins and Rochester, 1937.

Only the ²Δ_5/2 component has been analyzed Ram, Upadhya, et al., 1973.

Natural isotopic mixture.

Assignment by analogy with GeF Merer, 1979.

Spin doubling constant γ = -0.0836.

D₁ = 0.32₂E-6.

Franck-Condon factors Singh and Dube, 1971.

D₁ = 0.25₂E-6.

Λ-type doubling Δ v_fe = -0.058₈(J+1/2).

RKR potential curve Singh and Rai, 1966.

D₁ = 0.33₆E-6.

ThermochemicaI value (mass-spectrometry) Zmbov, Hastie, et al., 1968, recalculated with D₀⁰(CaF) = 5.4₈ eV.

References

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Zmbov, Hastie, et al., 1968
Zmbov, K.F.; Hastie, J.W.; Margrave, J.L., Mass spectrometric studies at high temperatures. Part 24. Thermodynamics of vaporization of SnF, and PbF, and the dissociation energies of SnF and PbF, J. Chem. Soc. Faraday Trans., 1968, 64, 861. [all data]

Hastie, Zmbov, et al., 1968
Hastie, J.W.; Zmbov, K.F.; Margrave, J.L., Mass spectrometric studies at high temperatures. XXIII. Vapor equilibria over molten NaSnF₃ and KSnF₃, J. Inorg. Nucl. Chem., 1968, 30, 729. [all data]

Johns and Barrow, 1958
Johns, J.W.C.; Barrow, R.F., The band spectrum of silicon monofluoride, SiF, Proc. Phys. Soc. (London), 1958, 71, 476. [all data]

Jenkins and Rochester, 1937
Jenkins, F.A.; Rochester, G.D., The spectrum of SnF, Phys. Rev., 1937, 52, 1135. [all data]

Barrow, Butler, et al., 1959
Barrow, R.F.; Butler, D.; Johns, J.W.C.; Powell, J.L., Some observations on the spectra of the diatomic fluorides of silicon, germanium, tin, and lead, Proc. Phys. Soc. London, 1959, 73, 317. [all data]

Uzikov and Kuzyakov, 1968
Uzikov, A.N.; Kuzyakov, Yu.Ya., Analysis of vibrational and rotational structure of SnF bands in the 2500 Å region, Moscow Univ. Chem. Bull. Engl. Transl., 1968, 23, 23, In original 33. [all data]

Barrow, Kopp, et al., 1962
Barrow, R.F.; Kopp, I.; Merer, A.J., Rotational analysis of the A²Σ⁺-X²Π, B²Σ⁺-X²Π systems of SnF, Proc. Phys. Soc. London, 1962, 79, 749. [all data]

Ram, Upadhya, et al., 1973
Ram, R.S.; Upadhya, K.N.; Rai, D.K., Rotational analysis of the C²Δ_5/2 - X²Π_3/2 and G²Δ_5/2-X²Π_3/2 systems of the SnF molecule, J. Phys. B:, 1973, 6, 372. [all data]

Merer, 1979
Merer, Private communication cited in Huber and Herzberg, 1979, 1979, 615. [all data]

Singh and Dube, 1971
Singh, J.; Dube, P.S., On the variation of electronic transition moment with the internuclear separation in SiCl & SnF molecules, Indian J. Pure Appl. Phys., 1971, 9, 164. [all data]

Singh and Rai, 1966
Singh, R.B.; Rai, D.K., Potential curves for some diatomic molecules: P₂, PN, SiN, NBr, BaO, BeF, SiF & SnF, Indian J. Pure Appl. Phys., 1966, 4, 102. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Company, New York, 1979, 716. [all data]

Notes

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Symbols used in this document:

AE Appearance energy
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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