dihydrogen selenide
- Formula: H2Se
- Molecular weight: 80.98
- IUPAC Standard InChI: InChI=1S/H2Se/h1H2
- IUPAC Standard InChIKey: SPVXKVOXSXTJOY-UHFFFAOYSA-N
- CAS Registry Number: 7783-07-5
- 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: Hydrogen selenide
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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 |
|---|---|---|---|---|---|
| 157.8 - 232.1 | 3.61094 | 596.484 | -66.353 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction 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.
Data compiled by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
HSe- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 341.48 ± 0.70 | kcal/mol | D-EA | Stoneman and Larson, 1986 | gas phase; Wagman, Evans, et al., 1982 ΔHf(AH) = 7.1 kcal/mol |
| ΔrH° | 342.7 ± 9.1 | kcal/mol | G+TS | Dixon, Holtz, et al., 1972 | gas phase; Between H2S, HCl; value altered from reference due to change in acidity scale |
| ΔrH° | 340.50 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; MnO-(t); ; ΔS(EA)=5.5 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 335.19 ± 0.80 | kcal/mol | H-TS | Stoneman and Larson, 1986 | gas phase; Wagman, Evans, et al., 1982 ΔHf(AH) = 7.1 kcal/mol |
| ΔrG° | 336.4 ± 9.0 | kcal/mol | IMRB | Dixon, Holtz, et al., 1972 | gas phase; Between H2S, HCl; value altered from reference due to change in acidity scale |
| ΔrG° | 334.20 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; MnO-(t); ; ΔS(EA)=5.5 |
+
= (
•
)
By formula: NO2- + H2Se = (NO2- • H2Se)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 20.9 ± 1.0 | kcal/mol | TDEq | Wlodek, Luczynski, et al., 1983 | gas phase; Equilibration with SO2..NO2- |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 10.3 ± 3.5 | kcal/mol | TDEq | Wlodek, Luczynski, et al., 1983 | gas phase; Equilibration with SO2..NO2- |
( • 2
) +
= (
• 3
)
By formula: (NO2- • 2H2Se) + H2Se = (NO2- • 3H2Se)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 7.30 ± 0.70 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 3.10 ± 0.50 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
( •
) +
= (
• 2
)
By formula: (NO3- • H2Se) + H2Se = (NO3- • 2H2Se)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 7.20 ± 0.50 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 4.60 ± 0.70 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
( •
) +
= (
• 2
)
By formula: (NO2- • H2Se) + H2Se = (NO2- • 2H2Se)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 8.50 ± 0.50 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 4.70 ± 0.30 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
+
= (
•
)
By formula: NO3- + H2Se = (NO3- • H2Se)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 17.20 ± 0.60 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 7.60 ± 0.50 | kcal/mol | TDAs | Wlodek, Luczynski, et al., 1983 | gas phase |
Vibrational and/or electronic energy levels
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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: Takehiko Shimanouchi
Symmetry: C2ν Symmetry Number σ = 2
| Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
| a1 | 1 | Sym str | 2345 | B | 2344.5 S | gas | ||||
| a1 | 2 | Bend | 1034 | A | 1034.2 S | gas | ||||
| b1 | 3 | Anti str | 2358 | B | 2357.8 S | gas | ||||
Source: Shimanouchi, 1972
Notes
| S | Strong |
| A | 0~1 cm-1 uncertainty |
| B | 1~3 cm-1 uncertainty |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, 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]
Stoneman and Larson, 1986
Stoneman, R.C.; Larson, D.J.,
Photodetachment spectroscopy of SeH- in a magnetic field,
J. Phys. B:, 1986, 19, 405. [all data]
Wagman, Evans, et al., 1982
Wagman, D.D.; Evans, W.H.; Parker, V.B.; Schumm, R.H.; Halow, I.; Bailey, S.M.; Churney, K.L.; Nuttall, R.L.,
The NBS Tables of Chemical Thermodynamic Properties (NBS Tech Note 270),
J. Phys. Chem. Ref. Data, Supl. 1, 1982, 11. [all data]
Dixon, Holtz, et al., 1972
Dixon, D.A.; Holtz, D.; Beauchamp, J.L.,
Acidity, basicity, and gas-phase ion chemistry of hydrogen selenide by ion cyclotron resonance spectroscopy,
Inorg. Chem., 1972, 11, 960. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [all data]
Wlodek, Luczynski, et al., 1983
Wlodek, S.; Luczynski, Z.; Wincel, H.,
Gas - Phase Solvation of NO2- and NO3- by Ethyl Nitrate,
Int. J. Mass Spectrom. Ion Phys., 1983, 52, 2-3, 149, https://doi.org/10.1016/0020-7381(83)85036-0
. [all data]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]
Notes
Go To: Top, Phase change data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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