Dimethyl selenide
- Formula: C2H6Se
- Molecular weight: 109.03
- IUPAC Standard InChIKey: RVIXKDRPFPUUOO-UHFFFAOYSA-N
- CAS Registry Number: 593-79-3
- 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: (CH3)2Se; Selenium dimethyl; Dimethylselenium; Methane, selenobis-; Selenide, dimethyl-; Methyl selenide; Methyl selenium
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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.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°liquid | 210.8 | J/mol*K | N/A | Rabinovich, Sheiman, et al., 1991 |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
121.1 | 298.15 | Rabinovich, Sheiman, et al., 1991 | T = 5 to 300 K. |
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.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 331. | K | N/A | Goldish, Hedberg, et al., 1955 | Uncertainty assigned by TRC = 3. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 185.14 | K | N/A | Rabinovich, Sheiman, et al., 1991, 2 | Uncertainty assigned by TRC = 0.01 K; TRC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
30.3 ± 0.1 | 295. | N/A | Dykyj, Svoboda, et al., 1999 | Based on data from 280. to 318. K. See also Baev, 1997.; AC |
31.9 | 295. | I | Karlson, Frankenberger, et al., 1994 | Based on data from 278. to 313. K.; AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
8.499 | 185.14 | Rabinovich, Sheiman, et al., 1991 | DH |
8.5 | 185.1 | Rabinovich, Sheiman, et al., 1991, 3 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
45.90 | 185.14 | Rabinovich, Sheiman, et al., 1991 | DH |
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 compiled as indicated in comments:
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
View reactions leading to C2H6Se+ (ion structure unspecified)
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.36 | PE | Chang, Young, et al., 1986 | LBLHLM |
8.40 | PE | Bock, Aygen, et al., 1984 | LBLHLM |
8.400 ± 0.010 | S | Scott, Causley, et al., 1973 | LLK |
8.40 | PE | Cradock and Whiteford, 1972 | Vertical value; LLK |
Mass spectrum (electron ionization)
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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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Chemical Concepts |
NIST MS number | 222539 |
Gas Chromatography
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), NIST Free Links, NIST Subscription Links, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | SE-30 (10 %) + CW-20M (1 %) | 112. | 582. | Hillen and Werner, 1973 | Nitrogen, Chromosorb W DCMS (100-120 mesh); Column length: 2. m |
Packed | SE-30 (10 %) + CW-20M (1 %) | 50. | 514. | Hillen and Werner, 1973 | Nitrogen, Chromosorb W DCMS (100-120 mesh); Column length: 2. m |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, NIST Free Links, NIST Subscription Links, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Rabinovich, Sheiman, et al., 1991
Rabinovich, I.B.; Sheiman, M.S.; Kamelova, G.P.; Nistrotov, V.P.; Karataev, E.N.,
Heat capacity and thermodynamic functions of methyl derivatives of selenium,
Zhur. Fiz. Khim., 1991, 65, 2071-2076. [all data]
Goldish, Hedberg, et al., 1955
Goldish, E.; Hedberg, K.; Marsh, R.E.; Schomaker, V.,
An Electron Diffraction Investigation of Dimethyl Selenide,
J. Am. Chem. Soc., 1955, 77, 2948-9. [all data]
Rabinovich, Sheiman, et al., 1991, 2
Rabinovich, I.B.; Sheiman, M.S.; Kamelova, G.P.; Nistratov, V.P.; Karataev, E.N.,
Heat capacities and thermodynamic functions of methyl selenium compounds,
Zh. Fiz. Khim., 1991, 65, 2071-6. [all data]
Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R.,
Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]
Baev, 1997
Baev, A.K.,
Thermodynamic study of structural changes in solutions of dimethyl-zinc with methyl compounds of Group VIB elements,
Zh. Neorg. Khim., 1997, 42, 4, 662. [all data]
Karlson, Frankenberger, et al., 1994
Karlson, U.; Frankenberger, W.T.; Spencer, W.F.,
Physicochemical properties of dimethyl selenide and dimethyl diselenide,
J. Chem. Eng. Data, 1994, 39, 3, 608-610, https://doi.org/10.1021/je00015a049
. [all data]
Rabinovich, Sheiman, et al., 1991, 3
Rabinovich, I.B.; Sheiman, M.S.; Kamelova, G.P.; Nistratov, V.P.; Karataev, E.N.,
Heat capacities and thermodynamic functions of methyl selenium compounds,
Zh. Fiz. Khim., 1991, 65, 8, 2071. [all data]
Chang, Young, et al., 1986
Chang, F.C.; Young, V.Y.; Prather, J.W.; Cheng, K.L.,
Study of methyl chalcogen compounds with ultraviolet photoelectron spectroscopy,
J. Electron Spectrosc. Relat. Phenom., 1986, 40, 363. [all data]
Bock, Aygen, et al., 1984
Bock, H.; Aygen, S.; Rosmus, P.; Solouki, B.; Weissflog, E.,
Gasphasen-reaktionen,40. Selenoformaldehyd: Hochkorrelierte wellenfunktion und photoelektronenspektroskopischer nachweis,
Chem. Ber., 1984, 117, 187. [all data]
Scott, Causley, et al., 1973
Scott, J.D.; Causley, G.C.; Russell, B.R.,
Vacuum ultraviolet absorption spectra of dimethylsulfide, dimethylselenide, and dimethyltelluride,
J. Chem. Phys., 1973, 59, 6577. [all data]
Cradock and Whiteford, 1972
Cradock, S.; Whiteford, R.A.,
Photoelectron spectra of the methyl, silyl and germyl derivatives of the group VI elements,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 281. [all data]
Hillen and Werner, 1973
Hillen, L.W.; Werner, R.L.,
Correlation of retention index data for dimethyl polysulfides, polyselenides, and related thiaselena-alkanes,
J. Chromatogr., 1973, 79, 318-321, https://doi.org/10.1016/S0021-9673(01)85303-6
. [all data]
Notes
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- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Tboil Boiling point Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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