Selenium(IV) oxide
- Formula: O2Se
- Molecular weight: 110.96
- IUPAC Standard InChI: InChI=1S/O2Se/c1-3-2
- IUPAC Standard InChIKey: JPJALAQPGMAKDF-UHFFFAOYSA-N
- CAS Registry Number: 7446-08-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Selenium oxide; Selenium dioxide; SeO2; Selenious anhydride; Selenium oxide (SeO2); Selenium(iv) dioxide (1:2); Rcra waste number U204; Selenous acid anhydride
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Phase change data
Go To: Top, 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.
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 430. to 590. | 8.32976 | 5199.756 | 34.002 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Gas phase ion energetics data
Go To: Top, Phase change 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 as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to O2Se+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.823 ± 0.040 | LPES | Snodgrass, Coe, et al., 1989 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.5 ± 0.5 | EI | Ficalora, Thompson, et al., 1969 | RDSH |
| 11.76 | PE | Potts, 1977 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| SeO+ | 13.0 ± 0.5 | O | EI | Ficalora, Thompson, et al., 1969 | RDSH |
| Se+ | 16.8 ± 0.5 | ? | EI | Ficalora, Thompson, et al., 1969 | RDSH |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
Snodgrass, Coe, et al., 1989
Snodgrass, J.T.; Coe, J.V.; McHugh, K.M.; Freidhoff, C.B.; Bowen, K.H.,
Photoelectron Spectroscopy of the Selenium and Tellurium Containing Negative Ions: SeO2-, Se2- and Te2-,
J. Phys. Chem., 1989, 93, 4, 1249, https://doi.org/10.1021/j100341a016
. [all data]
Ficalora, Thompson, et al., 1969
Ficalora, P.J.; Thompson, J.C.; Margrave, J.L.,
Mass spectrometric studies at high temperatures-XXVI.The sublimation of SeO, and SeO3,
J. Inorg. Nucl. Chem., 1969, 31, 3771. [all data]
Potts, 1977
Potts, A.W.,
The valence electronic structure of SeO2 studied by UPS its relation to that of other group VIB dioxides,
J. Electron Spectrosc. Relat. Phenom., 1977, 11, 157. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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