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Mercury, dimethyl-


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
Deltafgas94.4 ± 0.9kJ/molReviewMartinho Simões 
Deltafgas96.4 ± 4.0kJ/molReviewMartinho Simões 
Deltafgas86.5 ± 2.3kJ/molReviewMartinho Simões 
Deltafgas92.4 ± 3.1kJ/molReviewMartinho SimõesSelected data. Average of the values from Carson, Carson, et al., 1952 and Hartley, Pritchard, et al., 1950.
Deltafgas196.8kJ/molReviewMartinho 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
Deltafliquid61.8 ± 3.9kJ/molReviewMartinho Simões 
Deltafliquid51.9 ± 2.1kJ/molReviewMartinho Simões 
Deltafliquid57.8 ± 3.0kJ/molReviewMartinho SimõesSelected data. Average of the values from Carson, Carson, et al., 1952 and Hartley, Pritchard, et al., 1950.
Deltafliquid59.8 ± 0.4kJ/molCC-SBCarson, Carson, et al., 1952Value 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
Deltafsolid162.2kJ/molReviewMartinho Simões 
Quantity Value Units Method Reference Comment
Deltacsolid-1806.7kJ/molCC-SBBerthelot, 1899Please 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
Deltavap34.6 ± 0.8kJ/molCC-SBLong and Cattanach, 1961MS
Quantity Value Units Method Reference Comment
Deltasub34.6 ± 0.8kJ/molCC-SBLong and Cattanach, 1961MS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Reference Comment
36.7 ± 0.1321.Baev, 2001Based on data from 275. - 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

Mercury, dimethyl- (g) = CH3Hg (g) + Methane (g)

By formula: C2H6Hg (g) = CH3Hg (g) + CH4 (g)

Quantity Value Units Method Reference Comment
Deltar239.3 ± 6.3kJ/molKinGJackson, 1989 
Deltar247. - 259.kJ/molN/ASmith and Patrick, 1983 
Deltar255. ± 17.kJ/molN/AMcMillen and Golden, 1982 

Mercury, dimethyl- (l) + 2Iodine (cr) = 2Methane, iodo- (l) + Mercury diiodide (cr)

By formula: C2H6Hg (l) + 2I2 (cr) = 2CH3I (l) + HgI2 (cr)

Quantity Value Units Method Reference Comment
Deltar-184.5 ± 0.8kJ/molRSCHartley, Pritchard, et al., 1950Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Mercury, dimethyl- (l) + 2Bromine (l) = 2Methane, bromo- (g) + Mercury(II) bromide (cr)

By formula: C2H6Hg (l) + 2Br2 (l) = 2CH3Br (g) + Br2Hg (cr)

Quantity Value Units Method Reference Comment
Deltar-302.1 ± 2.5kJ/molRSCHartley, Pritchard, et al., 1950Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Mercury, dimethyl- (l) + Cl2Hg (cr) = 2Mercury, chloromethyl- (cr)

By formula: C2H6Hg (l) + Cl2Hg (cr) = 2CH3ClHg (cr)

Quantity Value Units Method Reference Comment
Deltar-67.7 ± 2.3kJ/molRSCHartley, Pritchard, et al., 1950Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Mercury, dimethyl- (l) + Mercury(II) bromide (cr) = 2Mercury, bromomethyl- (cr)

By formula: C2H6Hg (l) + Br2Hg (cr) = 2CH3BrHg (cr)

Quantity Value Units Method Reference Comment
Deltar-61.0 ± 3.1kJ/molRSCHartley, Pritchard, et al., 1950Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Mercury, dimethyl- (l) + Mercury diiodide (cr) = 2Methylmercuric iodide (cr)

By formula: C2H6Hg (l) + HgI2 (cr) = 2CH3HgI (cr)

Quantity Value Units Method Reference Comment
Deltar-39.8 ± 1.6kJ/molRSCHartley, Pritchard, et al., 1950Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

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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Mass 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 NATIONAL BUREAU OF STANDARDS, WASHINGTON D.C., USA
NIST MS number 34446

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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:   D3h'(G+36)     Symmetry Number sigma = 6


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

a1' 1 CH3 s-str 2911  C  ia 2911 VS p liq. Free rotation
a1' 2 CH3 s-deform 1182  C  ia 1182 VS p liq. Free rotation
a1' 3 CHg s-str 515  C  ia 515 VS p liq. Free rotation
a1 4 Torsion  ia  ia Free rotation
a2 5 CH3 s-str 2925  D 2925 b gas  ia Free rotation
a2 6 CH3 s-deform 1191  C 1191 M gas  ia Free rotation
a2 7 CHg a-str 540  C 540 VS gas  ia Free rotation
e' 8 CH3 d-str 2962  C 2962 S gas Free rotation
e' 9 CH3 d-deform 1397  C 1397 W dp liq. Free rotation
e' 10 CH3 rock 780  C 780 VS gas 779 VW dp liq. Free rotation
e' 11 CHgC deform 161  C 161 M dp liq. Free rotation
e 12 CH3 d-str 2874  C 2874 S p liq. Free rotation
e 13 CH3 d-deform 1442  C 1442 W dp liq. Free rotation
e 14 CH3 rock 699  C 700 sh gas 699 M dp liq. Free rotation

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
VWVery weak
iaInactive
bBroad
shShoulder
pPolarized
dpDepolarized
C3~6 cm-1 uncertainty
D6~15 cm-1 uncertainty

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), 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.

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]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume II, J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [all data]


Notes

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