Methylmercuric iodide
- Formula: CH3HgI
- Molecular weight: 342.53
- IUPAC Standard InChI: InChI=1S/CH3.Hg.HI/h1H3;;1H/q;+1;/p-1
- IUPAC Standard InChIKey: JVDIOYBHEYUIBM-UHFFFAOYSA-M
- CAS Registry Number: 143-36-2
- 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: Mercury, iodomethyl-; Iodomethylmercury; Methyliodomercury; Methylmercury iodide; CH3HgI; Methylmercury(II) iodide
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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 | 5.16 ± 0.60 | kcal/mol | Review | Martinho Simões | The enthalpy of formation relies on 13.8 ± 0.72 kcal/mol for the enthalpy of formation of Hg(Me)2(l). |
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°solid | -10.4 ± 0.45 | kcal/mol | Review | Martinho Simões | The enthalpy of formation relies on 13.8 ± 0.72 kcal/mol for the enthalpy of formation of Hg(Me)2(l). |
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 |
|---|---|---|---|---|---|
| ΔsubH° | 15.6 ± 0.41 | kcal/mol | RSC | Charnley and Skinner, 1951 | MS |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 15.6 ± 0.38 | 276. | V | Charnley and Skinner, 1951, 2 | Based on data from 263. - 290. 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
(l) +
(cr) = 2
(cr)
By formula: C2H6Hg (l) + HgI2 (cr) = 2CH3HgI (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -9.51 ± 0.38 | kcal/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 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
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.4 ± 0.2 | EI | Glockling, Irwin, et al., 1976 | LLK |
| 9.25 | PE | Eland, 1970 | Vertical value; RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| HgI+ | 12.2 ± 0.2 | CH3 | EI | Glockling, Irwin, et al., 1976 | 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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Due to licensing restrictions, this spectrum cannot be downloaded.
| 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. |
|---|---|
| NIST MS number | 15791 |
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: C3ν Symmetry Number σ = 3
| Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
| a1 | 1 | CH3 s-str | 2920 | D | 2920 M | sln. | 2914 | sln. | ||
| a1 | 2 | CH3 s-deform | 1180 | D | 1180 M | sln. | 1182 p | solid solid | ||
| a1 | 3 | CHg str | 531 | D | 531 M | sln. | 538 p | solid solid | ||
| a1 | 4 | HgI str | 184 | D | 184 M | sln. | 180 p | solid solid | ||
| e | 5 | CH3 d-str | 3008 | D | 3008 M | sln. | ||||
| e | 6 | CH3 d-deform | 1400 | D | 1400 W | sln. | ||||
| e | 7 | CH3 rock | 781 | D | 781 S | sln. | ||||
| e | 8 | CHgI bend | 64 | D | 64 M | sln. | ||||
Source: Shimanouchi, 1972
Notes
| S | Strong |
| M | Medium |
| W | Weak |
| p | Polarized |
| D | 6~15 cm-1 uncertainty |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics 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]
Charnley and Skinner, 1951
Charnley, T.; Skinner, H.A.,
J. Chem. Soc., 1951, 1921.. [all data]
Charnley and Skinner, 1951, 2
Charnley, T.; Skinner, H.A.,
424. Measurements of the vapour pressures of some alkylmercury halides. The latent heats of sublimation of methyl- and ethyl- mercury halides,
J. Chem. Soc., 1951, 1921, https://doi.org/10.1039/jr9510001921
. [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]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [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]
Glockling, Irwin, et al., 1976
Glockling, F.; Irwin, J.G.; Morrison, R.J.; Sweeney, J.J.,
A mass spectroscopic study of organomercurials and mercuric halides,
Inorg. Chim. Acta, 1976, 19, 267. [all data]
Eland, 1970
Eland, J.H.D.,
Photoelectron spectra and chemical bonding of mercury(II) compounds,
Intern. J. Mass Spectrom. Ion Phys., 1970, 4, 37. [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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- Symbols used in this document:
AE Appearance energy ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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