Strontium monoxide
- Formula: OSr
- Molecular weight: 103.62
- IUPAC Standard InChI: InChI=1S/O.Sr
- IUPAC Standard InChIKey: UFQXGXDIJMBKTC-UHFFFAOYSA-N
- CAS Registry Number: 1314-11-0
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: strontium oxide
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Gas phase thermochemistry data
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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 | -3.200 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1972 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 54.983 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1972 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 5000. to 6000. |
|---|---|
| A | 75.45674 |
| B | -23.35559 |
| C | 3.169193 |
| D | -0.152053 |
| E | -128.0712 |
| F | -163.3449 |
| G | 44.53274 |
| H | -3.200000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1972 |
Condensed phase thermochemistry data
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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°liquid | -123.64 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1972 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 19.32 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1972 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -141.50 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1972 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 13.25 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1972 |
Liquid 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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 2938. to 5000. |
|---|---|
| A | 16.00000 |
| B | 2.773980×10-8 |
| C | -6.244652×10-9 |
| D | 4.854432×10-10 |
| E | 4.238672×10-8 |
| F | -132.6130 |
| G | 32.83970 |
| H | -123.6360 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1972 |
Solid 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 (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 2938. |
|---|---|
| A | 11.60400 |
| B | 2.090831 |
| C | -0.213663 |
| D | 0.027499 |
| E | -0.121368 |
| F | -145.4670 |
| G | 25.99161 |
| H | -141.5000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1972 |
Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 2341. to 2683. | 4.7888 | 9937.521 | -1045.447 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Gas phase ion energetics data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 6.6 ± 0.2 | eV | N/A | N/A | L |
| Quantity | Value | Units | Method | Reference | Comment |
| Proton affinity (review) | 289.0 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 282.19 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 6.60 ± 0.18 | END/DER | Dalleska and Armentrout, 1994 | LL |
| 6.4 ± 0.25 | EVAL | Belyaev, Gotkis, et al., 1990 | LL |
| 6.60 ± 0.05 | PE | Dyke, Feher, et al., 1987 | LBLHLM |
| 7.0 ± 0.15 | DER | Murad, 1983 | LBLHLM |
| 7.0 ± 0.2 | EI | Murad, 1981 | LLK |
| 7. ± 1. | EI | Farber and Srivastava, 1976 | LLK |
| 6.1 | EI | Drowart, Exsteen, et al., 1964 | RDSH |
| 6.91 ± 0.02 | PE | Dyke, Feher, et al., 1987 | Vertical value; LBLHLM |
Constants of diatomic molecules
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C 1Σ+ | 28632.7 | 480.2 Z | 2.6 | 0.2742 1 | 0.0021 | 3.5E-7 | 2.131 | C → X 2 R | 28546.43 Z | |||
| ↳Mahanti, 1932; missing citation | ||||||||||||
| B 1Π | 24701.0 | 519.91 Z | 3.24 | 0.2937 | 0.0015 | 5.0E-7 | 2.059 | B → X 2 R | 24634.4 Z | |||
| ↳Mahanti, 1932; missing citation; Deezsi, Koczkas, et al., 1954 | ||||||||||||
| Unclassified bands in the regions 14700 - 15700 and 16600 - 16900 cm-1. The emitter of these bands has long been in doubt Charton and Gaydon, 1956 Pearse and Gaydon, 1976; in flames, and in arcs in water vapour, strong bands attributed to SrOH ocur in the same regions Lagerqvist and Huldt, 1955 Huldt and Lagerqvist, 1956. The bands have recently been observed in dry Sr + N2O + CO (or N2*) flames, both in emission and in absorption Benard, Slafer, et al., 1977 Eckstrom, Barker, et al., 1977 missing citation, and have tentatively been attributed to the transitions 3Δ ↔ a 3Π and 1Δ, 1Σ- ↔ A' 1Π or SrO. | ||||||||||||
| A 1Σ+ | 10886.59 | 619.58 Z | 0.89 3 | 0.30471 4 | 0.00112 | 3.2E-7 | 2.0219 | A → X 5 R | 10870.40 Z | |||
| ↳missing citation; missing citation; Almkvist and Lagerqvist, 1950; missing citation; missing citation; Brewer and Hauge, 1968 | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| A' 1Π | 9400 | 472.8 6 H | 2.06 | 0.2565 7 | 0.0017 | 2.204 | A' → X R | 9310 H | ||||
| ↳Capelle, Broida, et al., 1975; Hecht, 1976 | ||||||||||||
| a 3Πi | 9149 8 | 463.5 | 1.61 | 0.2584 | 0.0020 | 2.196 | ||||||
| X 1Σ+ | 0 | 653.49 Z | 3.96 | 0.337980 | 0.002194 | 3.6E-7 | 1.91983 9 | |||||
| ↳Ault and Andrews, 1975 | ||||||||||||
| Microwave and rf sp. 10 11 | ||||||||||||
| ↳Kaufman, Wharton, et al., 1965 | ||||||||||||
Notes
| 1 | In nitrogen matrices. |
| 2 | RKR Franck-Condon factors Liszt and Smith, 1971. |
| 3 | Bandheads in the region 8959-9166 cm-1, originally Lagerqvist and Selin, 1956 attributed to a new system of SrO, have been shown Brewer and Hauge, 1968 to belong to the A → X 0-3 sequence. |
| 4 | Numerous perturbations by levels of a 3Πi and A' 1Π Almkvist and Lagerqvist, 1950, Field, 1974. |
| 5 | Franck-Condon factors Nicholls, 1962. |
| 6 | Vibrational numbering Capelle, Broida, et al., 1975 confirmed by isotope studies Hecht, 1976. |
| 7 | The rotational constants have been derived Capelle, Broida, et al., 1975 with the help of information gained from the analysis of perturbations in A 1Σ+ Almkvist and Lagerqvist, 1950, Field, 1974. |
| 8 | A = -70; all constants for this state derived by Field, 1974 from perturbations in A 1Σ+ Almkvist and Lagerqvist, 1950. |
| 9 | IR SPectrum 13 |
| 10 | By the molecular beam electric resonance method. μel = 8.913 -0.026(v+1/2) D Kaufman, Wharton, et al., 1965. |
| 11 | Ab initio calculations of various ground state properties Yoshimine, 1968. |
| 12 | From the appearance threshold of SrO in a crossed-beam |
| 13 | missing note |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Constants of diatomic molecules, NIST Free Links, 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]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Dalleska and Armentrout, 1994
Dalleska, N.F.; Armentrout, P.B.,
Guided ion beam studies of reactions of alkaline earth ions with O2,
Int. J. Mass Spectrom. Ion Processes, 1994, 134, 203. [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]
Dyke, Feher, et al., 1987
Dyke, J.M.; Feher, M.; Gravenor, B.W.J.; Morris, A.,
High-temperature photoelectron spectroscopy: A study of the alkaline earth oxides SrO and BaO,
J. Phys. Chem., 1987, 91, 4476. [all data]
Murad, 1983
Murad, E.,
Abstraction reactions of Ca+ and Sr+ ions,
J. Chem. Phys., 1983, 78, 6611. [all data]
Murad, 1981
Murad, E.,
Thermochemical properties of the gaseous alkaline earth monohydroxides,
J. Chem. Phys., 1981, 75, 4080. [all data]
Farber and Srivastava, 1976
Farber, M.; Srivastava, R.D.,
The dissociation energies of calcium oxide and strontium oxide,
High Temp. Sci., 1976, 8, 73. [all data]
Drowart, Exsteen, et al., 1964
Drowart, J.; Exsteen, G.; Verhaegen, G.,
Mass spectrometric determination of the dissociation energy of the molecules MgO, CaO, SrO and Sr2O,
J. Chem. Soc. Faraday Trans., 1964, 60, 1920. [all data]
Mahanti, 1932
Mahanti, P.C.,
The band spectra of MgO, CaO and SrO,
Phys. Rev., 1932, 42, 609. [all data]
Deezsi, Koczkas, et al., 1954
Deezsi, I.; Koczkas, E.; Matrai, T.,
Rotationsanalyse einiger blauen Banden des SrO-Molekuls,
Acta Phys. Acad. Sci. Hung., 1954, 3, 95. [all data]
Charton and Gaydon, 1956
Charton, M.; Gaydon, A.G.,
Band spectra emitted by strontium and barium in arcs and flames,
Proc. Phys. Soc. London Sect. A, 1956, 69, 520. [all data]
Pearse and Gaydon, 1976
Pearse, R.W.B.; Gaydon, A.G.,
The identification of molecular spectra, Pub. London - 4th Edition, Chapman and Hall, John Wiley & Sons, Inc., New York, 1976, 0. [all data]
Lagerqvist and Huldt, 1955
Lagerqvist, A.; Huldt, L.,
Die Trager der Flammenspektren der Erdalkalimetalle,
Die Naturwissenschaften, 1955, 42, 365. [all data]
Huldt and Lagerqvist, 1956
Huldt, L.; Lagerqvist, A.,
Zum Ursprung der Bandenspektren von Calcium und Strontium,
Ark. Fys., 1956, 11, 347. [all data]
Benard, Slafer, et al., 1977
Benard, D.J.; Slafer, W.D.; Hecht, J.,
Chain reaction chemiluminescence of alkaline earth catalyzed N2O-CO flames,
J. Chem. Phys., 1977, 66, 1012. [all data]
Eckstrom, Barker, et al., 1977
Eckstrom, D.J.; Barker, J.R.; Hawley, J.G.; Reilly, J.P.,
Intracavity dye laser spectroscopy studies of the Ba + N2O, Ca + N2O + CO, and Sr + N2O + CO reactions,
Appl. Opt., 1977, 16, 2102. [all data]
Almkvist and Lagerqvist, 1950
Almkvist, G.; Lagerqvist, A.,
Perturbations in the infra-red bands of SrO,
Ark. Fys., 1950, 2, 233. [all data]
Brewer and Hauge, 1968
Brewer, L.; Hauge, R.,
Near infrared bands of diatomic CaO and SrO,
J. Mol. Spectrosc., 1968, 25, 330. [all data]
Capelle, Broida, et al., 1975
Capelle, G.A.; Broida, H.P.; Field, R.W.,
Photon yields of several reactions producing diatomic strontium oxide and halides, and SrO (A'1Π-X1Σ): a new band system,
J. Chem. Phys., 1975, 62, 3131. [all data]
Hecht, 1976
Hecht, J.,
Vibrational analysis of the A'1Π state of strontium oxide using two isotopes,
J. Chem. Phys., 1976, 65, 5026. [all data]
Ault and Andrews, 1975
Ault, B.S.; Andrews, L.,
Nitrogen matrix reactions of alkaline earth metal atoms with ozone: infrared spectra of the alkaline earth metal oxide molecules,
J. Chem. Phys., 1975, 62, 2320. [all data]
Kaufman, Wharton, et al., 1965
Kaufman, M.; Wharton, L.; Klemperer, W.,
Electronic structure of SrO,
J. Chem. Phys., 1965, 43, 943. [all data]
Liszt and Smith, 1971
Liszt, H.S.; Smith, Wm.H.,
RKR Franck-Condon factors for blue and ultraviolet transitions of some metal oxides,
J. Quant. Spectrosc. Radiat. Transfer, 1971, 11, 1043. [all data]
Lagerqvist and Selin, 1956
Lagerqvist, A.; Selin, L.-E.,
Einige ultrarote Banden des SrO Molekules,
Ark. Fys., 1956, 11, 323. [all data]
Field, 1974
Field, R.W.,
Assignment of the lowest 3Π and 1Π states of CaO, SrO, and BaO,
J. Chem. Phys., 1974, 60, 2400. [all data]
Nicholls, 1962
Nicholls, R.W.,
Franck-Condon factors to high vibrational quantum numbers II: SiO, MgO, SrO, AlO, VO, NO,
J. Res. Nat. Bur. Stand. Sect. A, 1962, 66, 227. [all data]
Yoshimine, 1968
Yoshimine, Y.,
Computed ground state properties of BeO, MgO, CaO, and SrO in molecular orbital approximation,
J. Phys. Soc. Jpn., 1968, 25, 1100. [all data]
Notes
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- Symbols used in this document:
IE (evaluated) Recommended ionization energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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