Strontium monoiodide
- Formula: ISr
- Molecular weight: 214.52
- CAS Registry Number: 14696-99-2
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Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -30.49 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 272.21 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1974 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = 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
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1500. | 1500. to 6000. |
|---|---|---|
| A | 37.36860 | 50.21930 |
| B | 0.753848 | -10.18365 |
| C | -0.106269 | 3.051128 |
| D | 0.034216 | -0.221890 |
| E | -0.040021 | -6.116715 |
| F | -41.80234 | -56.05430 |
| G | 316.9899 | 323.5705 |
| H | -30.49404 | -30.49404 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1974 | Data last reviewed in June, 1974 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to ISr+ (ion structure unspecified)
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 5.62 ± 0.06 | EVAL | Belyaev, Gotkis, et al., 1990 | LL |
| 5.5 ± 0.3 | EI | Kleinschmidt and Hildenbrand, 1978 | LLK |
Constants of diatomic molecules
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References, Notes
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 September, 1977
| Symbol | Meaning |
|---|---|
| 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) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F | 210.4 H | 0.40 | F → A or B V | 19902.1 H | ||||||||
| ↳Kamalasanan, 1975 | ||||||||||||
| F → A or B V | 19599.3 H | |||||||||||
| ↳Kamalasanan, 1975 | ||||||||||||
| D (2Σ) | 28944.0 | 200.4 H | 0.50 | D → X V | 28957.1 H | |||||||
| ↳missing citation; Ashrafunnisa, Rao, et al., 1973 | ||||||||||||
| C (2Π) | 23223.4 | 168.5 H | 0.40 | C ↔ X 1 R | 23220.6 H | |||||||
| ↳Walters and Barratt, 1928; Mesnage, 1939; missing citation | ||||||||||||
| 22666.1 | 170.9 H | 0.36 | C ↔ X 1 R | 22664.5 H | ||||||||
| ↳Walters and Barratt, 1928; Mesnage, 1939; missing citation | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| B (2Σ) | 14815.9 2 | 182.2 H | 0.37 | B → X 1 V | 14820.1 H | |||||||
| ↳missing citation | ||||||||||||
| A (2Π) | 14748.8 2 | 179.5 H | 0.32 | A ↔ X 1 V | 14751.7 H | |||||||
| ↳Walters and Barratt, 1928; Shukla, 1970; Reddy, Reddy, et al., 1971; missing citation | ||||||||||||
| 14422.7 2 | 182.3 H | 0.54 | A ↔ X 1 V | 14427.0 H | ||||||||
| ↳Walters and Barratt, 1928; Shukla, 1970; Reddy, Reddy, et al., 1971; missing citation | ||||||||||||
| X 2Σ+ | 0 | 174.1 3 H | 0.35 3 | |||||||||
Notes
| 1 | Radiative lifetimes measured by Dagdigian, Cruse, et al., 1974: τ(A)= 42 ns, τ(B)= 46 ns, τ(C)= 36 ns. There seems to be some uncertainty concerning the correct identification of the B state emission. |
| 2 | According to Ashrafunnisa, Rao, et al., 1973, 2 the tentative assignments for these two states or substates (i.e. Σ and Π) should be reversed. |
| 3 | Average values for the lower state constants of A.. .D → X. |
| 4 | From a reactive scattering study of the Sr + HI reaction by the crossed molecular beam technique Mims, Lin, et al., 1972. The ionic model calculations of Krasnov and Karaseva, 1965 predict D00 ~ 2.92 eV Krasnov and Karaseva, 1965. |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Belyaev, Gotkis, et al., 1990
Belyaev, V.N.; Gotkis, I.S.; Lebedeva, N.L.; Krasnov, K.S.,
Ionization potentials of MX molecules (M = Ca, Sr, Ba; X = F, Cl, Br, I, OH, O),
Russ. J. Phys. Chem., 1990, 64, 773. [all data]
Kleinschmidt and Hildenbrand, 1978
Kleinschmidt, P.D.; Hildenbrand, D.L.,
Dissociation energies of CaI, SrI, and BaI from high temperature mass spectrometry,
J. Chem. Phys., 1978, 68, 2819. [all data]
Kamalasanan, 1975
Kamalasanan, M.N.,
New band system of SrI molecule in the region 4900-5250 Å,
Indian J. Pure Appl. Phys., 1975, 13, 124. [all data]
Ashrafunnisa, Rao, et al., 1973
Ashrafunnisa; Rao, D.V.K.; Rao, P.T.,
A new ultraviolet band system of the SrI molecule,
J. Phys. B:, 1973, 6, 2653. [all data]
Walters and Barratt, 1928
Walters, O.H.; Barratt, S.,
The alkaline earth halide spectra and their origin,
Proc. R. Soc. London A, 1928, 118, 120. [all data]
Mesnage, 1939
Mesnage, P.,
Recherches sur les decharges de haute frequence et leur application a la spectroscopie moleculaire,
Ann. Phys. (Paris), 1939, 12, 5. [all data]
Shukla, 1970
Shukla, M.M.,
Analysis of the A-X band system of the SrI molecule,
Indian J. Pure Appl. Phys., 1970, 8, 855. [all data]
Reddy, Reddy, et al., 1971
Reddy, B.R.K.; Reddy, Y.P.; Rao, C.G.R.; Rao, P.T.,
The spectrum of SrI in the photographic infrared,
Curr. Sci., 1971, 40, 186. [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]
Ashrafunnisa, Rao, et al., 1973, 2
Ashrafunnisa; Rao, D.V.K.; Rao, P.T.,
The band spectrum of SrI in the region λ6500-λ7200 Å,
J. Phys. B:, 1973, 6, 1503. [all data]
Mims, Lin, et al., 1972
Mims, C.A.; Lin, S.-M.; Herm, R.R.,
Crossed beam collision mechanics: reactions of Ca, Sr, and Ba with HI and limits on D0° for CaI, SrI, and BaI,
J. Chem. Phys., 1972, 57, 3099. [all data]
Krasnov and Karaseva, 1965
Krasnov, K.S.; Karaseva, N.V.,
Reevaluation of the spectroscopic dissociation energies of subhalides of the IIa group,
Opt. Spectrosc. Engl. Transl., 1965, 19, 14, In original 30. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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