Strontium monochloride

Formula: ClSr
Molecular weight: 123.07
IUPAC Standard InChI: InChI=1S/ClH.Sr/h1H;/q;+1/p-1
IUPAC Standard InChIKey: XFDAMOCMNCFGMN-UHFFFAOYSA-M
CAS Registry Number: 14989-33-4
Chemical structure:
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Other data available:
- Gas phase ion energetics data
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Gas phase thermochemistry data

Go To: Top, Constants of diatomic molecules, References, Notes

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-29.601	kcal/mol	Review	Chase, 1998	Data last reviewed in December, 1972
Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	60.296	cal/mol*K	Review	Chase, 1998	Data last reviewed in December, 1972

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.

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Temperature (K)	298. to 1500.	1500. to 6000.
A	8.863540	11.61100
B	0.299885	-2.052961
C	-0.143466	0.585060
D	0.040043	-0.038402
E	-0.024631	-1.371740
F	-32.33731	-35.43040
G	70.80179	72.18609
H	-29.59990	-29.59990
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in December, 1972	Data last reviewed in December, 1972

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, References, Notes

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⁾Sr³⁵Cl
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
H ²Σ⁺	34256.7	364.6 H	1.08								H → B	18562.7 H
	↳Novikov and Gurvich, 1965
											H ↔ X V	34287.8 H
	↳Harrington, 1942; Novikov and Gurvich, 1965
G (²Δ)	34085.4	356.7 H	1.0								G → A	18996.4 H
	↳Novikov and Gurvich, 1965
	34059.6	356.7 H	1.0								G → A	19264.8 H
	↳Novikov and Gurvich, 1965
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
F (²Π)	32974.8	354.2 H	1.09								F → B	17277.5 H
	↳Novikov and Gurvich, 1965
	32905.9	354.2 H	1.09								F → B	17208.4 H
	↳Novikov and Gurvich, 1965
											F → A	17884.6 H
	↳Novikov and Gurvich, 1965
											F → A	18109.9 H
	↳Novikov and Gurvich, 1965
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 ²Σ⁺	32201.8	346.3 H	1.10								E → A	17396.1 H
	↳Novikov and Gurvich, 1965
											E ↔ X V	32223.8 H
	↳Harrington, 1942; Novikov and Gurvich, 1965
D ²Σ⁺	28822.9	344.8 H	1.04								D → B	13123.7 H
	↳Novikov and Gurvich, 1965
											D → A	13727.0 H
	↳Novikov and Gurvich, 1965
											D → A	14021.8 H
	↳Novikov and Gurvich, 1965
											D ↔ X V	28844.1 H
	↳Harrington, 1942; Novikov and Gurvich, 1965
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 ²Π	25399.8	283.4 H	0.92								C ↔ X 1 R	25390.4 H
	↳Parker, 1935; More and Cornell, 1938; Novikov and Gurvich, 1965
	25244.6	282.1 H	0.89								C ↔ X 1 R	25234.5 H
	↳Parker, 1935; More and Cornell, 1938; Novikov and Gurvich, 1965
B ²Σ⁺	15719.5	306.4 H	0.98								B ↔ X 1 V	15721.5 2 H
	↳Parker, 1935; missing citation; Harrington, 1942; Singh, Nair, et al., 1970
	15719.5	306.4 H	0.98								B ↔ X 1 V	15713.1 2 H
	↳Parker, 1935; missing citation; Harrington, 1942; Singh, Nair, et al., 1970
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
A ²Π	15112.6	309.4 H	0.98								A ↔ X 1 V	15116.1 H
	↳Parker, 1935; More and Cornell, 1938; missing citation; Harrington, 1942; Novikov and Gurvich, 1965; Singh, Nair, et al., 1970
	14818.4	309.4 H	0.98								A ↔ X 1 V	14821.9 H
	↳Parker, 1935; More and Cornell, 1938; missing citation; Harrington, 1942; Novikov and Gurvich, 1965; Singh, Nair, et al., 1970
X ²Σ⁺	0	302.3 H	0.95

Notes

Dagdigian, Cruse, et al., 1974 have measured the following radiative lifetimes: τ(A)= 31 ns, τ(B)= 39 ns, τ(C)= 26 ns.

Double heads on account of large spin doubling.

Thermochemical value (mass-spectrometry) Hildenbrand, 1970 in very good agreement with the most recent flame photometric results of Gurvich, Ryabova, et al., 1971, Gurvich, Ryabova, et al., 1973. Jonah and Zare, 1971 place a lower limit to the dissociation energy at 4.2₉ eV based on their study of the Sr + Cl₂ chemiluminescent reaction.

References

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, Notes

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Novikov and Gurvich, 1965
Novikov, M.M.; Gurvich, L.V., A new study of the emission spectrum of the SrCl molecule, Opt. Spectrosc. Engl. Transl., 1965, 19, 76, In original 143. [all data]

Harrington, 1942
Harrington, Dissertation, University of California, California, 1942, 0. [all data]

Parker, 1935
Parker, A.E., Band systems of MgCl, CaCl, and SrCl, Phys. Rev., 1935, 47, 349. [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]

Singh, Nair, et al., 1970
Singh, J.; Nair, K.P.R.; Upadhya, K.N.; Rai, D.K., On the red bands of SrCl molecule, Opt. Pura Apl., 1970, 3, 76. [all data]

Dagdigian, Cruse, et al., 1974
Dagdigian, P.J.; Cruse, H.W.; Zare, R.N., Radiative lifetimes of the alkaline earth monohalides, J. Chem. Phys., 1974, 60, 2330. [all data]

Hildenbrand, 1970
Hildenbrand, D.L., Dissociation energies and chemical bonding in the alkaline-earth chlorides from mass spectrometric studies, J. Chem. Phys., 1970, 52, 5751. [all data]

Gurvich, Ryabova, et al., 1971
Gurvich, L.V.; Ryabova, V.G.; Khitrov, A.N.; Starovoitov, E.M., Spectrophotometric determination of dissociation energies of molecules. I. SrCl and SrOH, High Temp. Engl. Transl., 1971, 9, 261, In original 290. [all data]

Gurvich, Ryabova, et al., 1973
Gurvich, L.V.; Ryabova, V.G.; Khitrov, A.N., Determination of dissociation energies of alkaline-earth chlorides, bromides and hydroxides by flame photometry, Faraday Symp. Chem. Soc., 1973, 8, 83. [all data]

Jonah and Zare, 1971
Jonah, C.D.; Zare, R.N., Formation of group IIA dihalides by two-body radiative association, Chem. Phys. Lett., 1971, 9, 65. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References

Symbols used in this document:

S°_{gas,1 bar} Entropy of gas at standard conditions (1 bar)

Δ_fH°_gas Enthalpy of formation of gas at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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S°_{gas,1 bar}	Entropy of gas at standard conditions (1 bar)
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions