HSr

Formula: HSr
Molecular weight: 88.63
CAS Registry Number: 13966-64-8
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Constants of diatomic molecules

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 ⁽⁸⁸⁾SrH
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 several additional absorption systems above 30000 cm^-1; tentative rotational analyses.
↳missing citation; Khan and Butt, 1968; missing citation; missing citation
F ²Σ⁺	34096	[1337.0] Z	(33) 1		[4.0020] 2	0.09₂		[13.84E-5]		[2.0561]	F ← X V	34189.97 Z
F ²Σ⁺	↳missing citation; Khan, 1963; Khan, 1966; Khan and Butt, 1968
C ²Σ⁺	26230	1347 H	23.₅		4.008 3	0.132		14E-5		2.055	C ↔ X V	26298.7 Z
C ²Σ⁺	↳Frederickson, Hogan, et al., 1935; Humphreys and Fredrickson, 1936; More and Cornell, 1938; missing citation
D ²Σ⁺	20847.6	1014.1 Z	15.4		1.925 4	0.024		3E-5		2.965	D ↔ X 5 R	20752.0 Z
D ²Σ⁺	↳Watson, Fredrickson, et al., 1936; More and Cornell, 1938
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 ²Π					[3.869] 6			[20E-5]		[2.091]	E → X V	18960 Z
	↳Frederickson, Hogan, et al., 1935
					[3.639] 6			[10E-5]		[2.156]	E → X V	18860 Z
	↳Frederickson, Hogan, et al., 1935
B ²Σ⁺	14340	[1193.₀] Z	(19) 1		3.8788 7	0.0930		17.3E-5		2.0885	B → X V	14352.1 Z
B ²Σ⁺	↳missing citation; Watson, Fredrickson, et al., 1936
A ²Π_r	8				[3.679] 9			[11.3E-5]		[2.144]	A → X V	13653 Z
	↳missing citation
	8				[3.668] 9			[13.3E-5]		[2.148]	A → X V	13360 Z
	↳missing citation
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 ²Σ⁺	0	1206.2 Z	17.0		3.6751 10	0.0814		[13.5E-5] 11		2.1456 12
X ²Σ⁺	↳Knight and Weltner, 1971

Notes

From isotope relations.

Spin doubling constant γ₀ = +0.076. All lines are diffuse owing to predissociation.

Breaking-off in emission at low pressure above N'=19 and 4 in v'=0 and 1, respectively Khan, 1963, 2. Perturbations.

Strong perturbations.

Franck-Condon factors Singh and Srivastava, 1968.

Perturbations.

Spin doubling constant γ₀ = -3.81 N < 10 Watson, Fredrickson, et al., 1936. For a more elaborate evaluation of the spin splitting including higher-order correction terms see Veseth, 1971.

A₀ ~ +300. See also 9.

Very large Λ-type doubling, see Watson and Fredrickson, 1932, Veseth, 1971, 2. The constants given here are effective values; see, however, Veseth, 1971, 3 who has evaluated the true constants by taking into account several usually neglected corrections to the rotational energy formulae for a ²Π state.

From Watson, Fredrickson, et al., 1936; spin doubling constant γ0 = 0.122 Watson, Fredrickson, et al., 1936. Edvinsson, Kopp, et al., 1963 give B₀ = 3.6336, D₀ = 13.39E-5.

D₁ = 12.9E-5.

ESR sp. 14

From the predissociation in C ²Σ⁺ assuming dissociation into ³P₀ + ²S.

In argon matrix at 4 K.

Spin doubling constant γ₀ = +0.035₇.

From the value for SrH.

Breaking-off above N'=29 and 19 in v'=0 and 1, respectively Khan, 1963, 2. Strong perturbations.

Spin doubling constant γ₀ = -2.01 N < 10 Watson, Fredrickson, et al., 1936. See 7.

D₁ = 3.81E-5.

Spin doubling constant γ₀ = +0.061₃.

D₁ = 3.64E-5.

References

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Khan and Butt, 1968
Khan, M.A.; Butt, M.R., A study of some new absorption bands of SrH and SrD in the ultra-violet region, J. Phys. B:, 1968, 1, 745. [all data]

Khan, 1963
Khan, M.A., SrH and SrD bands at 2927 Å and 2928 Å, Proc. Phys. Soc. London, 1963, 81, 1047. [all data]

Khan, 1966
Khan, M.A., Rotational analysis of some new absorption bands of SrH and SrD in the ultra-violet region, Proc. Phys. Soc. London, 1966, 89, 165. [all data]

Frederickson, Hogan, et al., 1935
Frederickson, W.R.; Hogan, M.E., Jr.; Watson, W.W., The spectra of strontium hydride, Phys. Rev., 1935, 48, 602. [all data]

Humphreys and Fredrickson, 1936
Humphreys, R.F.; Fredrickson, W.R., The pressure effect on the C band of strontium hydride, Phys. Rev., 1936, 50, 542. [all data]

More and Cornell, 1938
More, K.R.; Cornell, S.D., The band spectra of SrCl and SrH, Phys. Rev., 1938, 53, 806. [all data]

Watson, Fredrickson, et al., 1936
Watson, W.W.; Fredrickson, W.R.; Hogan, M.E., Jr., Strontium deuteride and hydride spectra, Phys. Rev., 1936, 49, 150. [all data]

Knight and Weltner, 1971
Knight, L.B., Jr.; Weltner, W., Jr., Hyperfine interaction and chemical bonding in MgH, CaH, SrH, and BaH molecules, J. Chem. Phys., 1971, 54, 3875. [all data]

Khan, 1963, 2
Khan, M.A., Extension of the C²Σ → X²Σ system of SrD, Proc. Phys. Soc. London, 1963, 82, 564. [all data]

Singh and Srivastava, 1968
Singh, P.D.; Srivastava, Y.P., Franck-Condon factors and r-centroids for some bands of the SrH, J. Quant. Spectrosc. Radiat. Transfer, 1968, 8, 1443. [all data]

Veseth, 1971
Veseth, L., An investigation of the interaction between close-lying ²Σ and ²Π states of diatomic molecules. I. Spin-splitting of the ²Σ levels, Mol. Phys., 1971, 20, 1057. [all data]

Watson and Fredrickson, 1932
Watson, W.W.; Fredrickson, W.R., The spectrum of strontium hydride, Phys. Rev., 1932, 39, 765. [all data]

Veseth, 1971, 2
Veseth, L., An investigation of the interaction between close-lying ²Σ and ²Π states of diatomic molecules. II. Λ-doubling of the ²Π levels, Mol. Phys., 1971, 21, 287. [all data]

Veseth, 1971, 3
Veseth, L., Corrections to the spin-orbit splitting in ²Π states of diatomic molecules, J. Mol. Spectrosc., 1971, 38, 228. [all data]

Edvinsson, Kopp, et al., 1963
Edvinsson, G.; Kopp, I.; Lindgren, B.; Aslund, N., Rotational analysis of an ultraviolet system of the hydrides and deuterides of Ca, Sr and Ba, Ark. Fys., 1963, 25, 95. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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