Methane, diiodo-
- Formula: CH2I2
- Molecular weight: 267.8355
- IUPAC Standard InChI: InChI=1S/CH2I2/c2-1-3/h1H2
- IUPAC Standard InChIKey: NZZFYRREKKOMAT-UHFFFAOYSA-N
- CAS Registry Number: 75-11-6
- 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: Diiodomethane; Methylene diiodide; Methylene iodide; CH2I2; Dijodmethan; Methylenjodid; MI-Gee; Methyl diiodide; Mi-gee brand; NSC 35804
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 118. ± 4.2 | kJ/mol | Cm | Kudchadker and Kudchadker, 1976 | |
| ΔfH°gas | 122. ± 4.2 | kJ/mol | Eqk | Furuyama, Golden, et al., 1968 |
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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 68.5 ± 0.8 | kJ/mol | Ccr | Carson, Laye, et al., 1993 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -747.8 ± 0.6 | kJ/mol | Ccr | Carson, Laye, et al., 1993 | ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 133.81 | 298.15 | Carson, Laye, et al., 1993 | DH |
| 112.8 | 298.15 | Shehatta, 1993 | DH |
| 133.9 | 298. | Kurbatov, 1948 | T = 12 to 164°C. Mean Cp, three temperatures.; DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
+
= 2
By formula: CH4 + CH2I2 = 2CH3I
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -20. ± 4.2 | kJ/mol | Eqk | Furuyama, Golden, et al., 1968 | gas phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Kudchadker and Kudchadker, 1976
Kudchadker, S.A.; Kudchadker, A.P.,
Erratum: Ideal gas thermodynamic properties of eight bromo- and iodomethanes,
J. Phys. Chem. Ref. Data, 1976, 5, 529-530. [all data]
Furuyama, Golden, et al., 1968
Furuyama, S.; Golden, D.M.; Benson, S.W.,
The thermochemistry of the gas-phase equilibrium 2CH3I = CH4 + CH2i2. The heat of formation of CH2I2,
J. Phys. Chem., 1968, 72, 4713-4715. [all data]
Carson, Laye, et al., 1993
Carson, A.S.; Laye, P.G.; Pedley, J.B.; Welsby, A.M.,
The enthalpies of formation iodomethane, diiodomethane, triiodomethane, and tetraiodomethane by rotating combustion calorimetry,
J. Chem. Thermodyn., 1993, 25, 261-269. [all data]
Shehatta, 1993
Shehatta, I.,
Heat capacity at constant pressure of some halogen compounds,
Thermochim. Acta, 1993, 213, 1-10. [all data]
Kurbatov, 1948
Kurbatov, V.Ya.,
Heat capacity of liquids. 2. Heat capacity and the temperature dependence of heat capacity from halogen derivatives of acylic hydrocarbons,
Zh. Obshch. Kim., 1948, 18, 372-389. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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