Mercury, dimethyl-
- Formula: C2H6Hg
- Molecular weight: 230.66
- IUPAC Standard InChIKey: ATZBPOVXVPIOMR-UHFFFAOYSA-N
- CAS Registry Number: 593-74-8
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Dimethylmercury; (CH3)2Hg
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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.
Data compiled by: José A. Martinho Simões
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 94.4 ± 0.9 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | 96.4 ± 4.0 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | 86.5 ± 2.3 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | 92.4 ± 3.1 | kJ/mol | Review | Martinho Simões | Selected data. Average of the values from Carson, Carson, et al., 1952 and Hartley, Pritchard, et al., 1950. |
ΔfH°gas | 196.8 | kJ/mol | Review | Martinho Simões |
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: José A. Martinho Simões
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | 61.8 ± 3.9 | kJ/mol | Review | Martinho Simões | |
ΔfH°liquid | 51.9 ± 2.1 | kJ/mol | Review | Martinho Simões | |
ΔfH°liquid | 57.8 ± 3.0 | kJ/mol | Review | Martinho Simões | Selected data. Average of the values from Carson, Carson, et al., 1952 and Hartley, Pritchard, et al., 1950. |
ΔfH°liquid | 59.8 ± 0.4 | kJ/mol | CC-SB | Carson, Carson, et al., 1952 | Value corrected based on a set of ancillary data by J.A. Martinho Simões; Please also see Cox and Pilcher, 1970. The enthalpy of combustion is not reported in Carson, Carson, et al., 1952. |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°solid | 162.2 | kJ/mol | Review | Martinho Simões | |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -1806.7 | kJ/mol | CC-SB | Berthelot, 1899 | Please also see Berthelot, 1900. |
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:
MS - José A. Martinho Simões
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔvapH° | 34.6 ± 0.8 | kJ/mol | CC-SB | Long and Cattanach, 1961 | MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 34.6 ± 0.8 | kJ/mol | CC-SB | Long and Cattanach, 1961 | MS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
36.7 ± 0.1 | 321. | Baev, 2001 | Based on data from 275. to 367. K.; AC |
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: José A. Martinho Simões
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
(g) = CH3Hg (g) +
(g)
By formula: C2H6Hg (g) = CH3Hg (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 239.3 ± 6.3 | kJ/mol | KinG | Jackson, 1989 | |
ΔrH° | 247. to 259. | kJ/mol | N/A | Smith and Patrick, 1983 | |
ΔrH° | 255. ± 17. | kJ/mol | N/A | McMillen and Golden, 1982 |
By formula: C2H6Hg (l) + 2I2 (cr) = 2CH3I (l) + HgI2 (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -184.5 ± 0.8 | kJ/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
By formula: C2H6Hg (l) + 2Br2 (l) = 2CH3Br (g) + Br2Hg (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -302.1 ± 2.5 | kJ/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
(l) + Cl2Hg (cr) = 2
(cr)
By formula: C2H6Hg (l) + Cl2Hg (cr) = 2CH3ClHg (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -67.7 ± 2.3 | kJ/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
By formula: C2H6Hg (l) + Br2Hg (cr) = 2CH3BrHg (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -61.0 ± 3.1 | kJ/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
By formula: C2H6Hg (l) + HgI2 (cr) = 2CH3HgI (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -39.8 ± 1.6 | kJ/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
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
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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 771.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 740.8 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.10 ± 0.05 | PI | Distefano and Dibeler, 1970 | RDSH |
9.3 | PE | Creber and Bancroft, 1980 | Vertical value; LLK |
9.33 | PE | Nugent, Wu, et al., 1976 | Vertical value; LLK |
9.33 | PE | Fehlner, Ulman, et al., 1976 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3+ | 12.55 | CH3+Hg? | PI | Distefano and Dibeler, 1970 | RDSH |
CH3Hg+ | 10.10 ± 0.02 | CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
Hg+ | 13.05 ± 0.02 | 2CH3 | PI | Distefano and Dibeler, 1970 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry 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.
Martinho Simões
Martinho Simões, J.A.,
Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]
Carson, Carson, et al., 1952
Carson, A.S.; Carson, E.M.; Wilmshurst, B.,
Nature, 1952, 170, 320. [all data]
Hartley, Pritchard, et al., 1950
Hartley, K.; Pritchard, H.O.; Skinner, H.A.,
Thermochemistry of metallic alkyls. III.?mercury dimethyl and mercury methyl halides,
Trans. Faraday Soc., 1950, 46, 1019, https://doi.org/10.1039/tf9504601019
. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds
in Academic Press, New York, 1970. [all data]
Berthelot, 1899
Berthelot, M.,
Compt. Rend., 1899, 129, 918. [all data]
Berthelot, 1900
Berthelot, M.,
Ann. Chim. Phys., 1900, 20, 158. [all data]
Long and Cattanach, 1961
Long, L.H.; Cattanach, J.,
J. Inorg. Nucl. Chem., 1961, 20, 340. [all data]
Baev, 2001
Baev, A.K.,
Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 2001, 44, 1, 3. [all data]
Jackson, 1989
Jackson, R.L.,
Chem. Phys. Lett., 1989, 163, 315. [all data]
Smith and Patrick, 1983
Smith, G.P.; Patrick, R.,
Int. J. Chem. Kinet., 1983, 15, 167. [all data]
McMillen and Golden, 1982
McMillen, D.F.; Golden, D.M.,
Hydrocarbon bond dissociation energies,
Ann. Rev. Phys. Chem., 1982, 33, 493. [all data]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [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]
Distefano and Dibeler, 1970
Distefano, G.; Dibeler, V.H.,
Photoionization study of the dimethyl compounds of zinc, cadmium, and mercury,
Intern. J. Mass Spectrom. Ion Phys., 1970, 4, 59. [all data]
Creber and Bancroft, 1980
Creber, D.K.; Bancroft, G.M.,
Photoelectron studies of dialkyl group 2B compounds: Ligand field splittings intensity variations with photon energy,
Inorg. Chem., 1980, 19, 643. [all data]
Nugent, Wu, et al., 1976
Nugent, W.A.; Wu, M.M.-H.; Fehlner, T.P.; Kochi, J.K.,
Enhanced reactivity of exo-norbornyl derivatives. Evidence for σ-participation in the absence of steric effects,
J. Chem. Soc., Chem. Commun., 1976, 456. [all data]
Fehlner, Ulman, et al., 1976
Fehlner, T.P.; Ulman, J.; Nugent, W.A.; Kochi, J.K.,
Effect of alkyl substituents on the first ionization potential and on 5d10 ionization in dialkylmercury compounds,
Inorg. Chem., 1976, 15, 2544. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔcH°solid Enthalpy of combustion 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 ΔrH° Enthalpy of reaction at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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