Ethane, 1,2-diiodo-
- Formula: C2H4I2
- Molecular weight: 281.8621
- IUPAC Standard InChI: InChI=1S/C2H4I2/c3-1-2-4/h1-2H2
- IUPAC Standard InChIKey: GBBZLMLLFVFKJM-UHFFFAOYSA-N
- CAS Registry Number: 624-73-7
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Diiodoethane; Ethylene iodide; 1,2-Diiodoethane; CH2ICH2I
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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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 17.5 ± 0.26 | kcal/mol | Ccb | Carson, Laye, et al., 1994 | |
| ΔfH°gas | 15.97 ± 0.41 | kcal/mol | Eqk | Benson and Amano, 1962 | Reanalyzed by Cox and Pilcher, 1970, Original value = 15.9 ± 0.2 kcal/mol |
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: 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
+
=
By formula: C2H4 + I2 = C2H4I2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -11.5 ± 0.2 | kcal/mol | Eqk | Abrams and Davis, 1954 | gas phase |
| ΔrH° | -13.4 ± 0.5 | kcal/mol | Eqk | Cutherbertson and Kistiakowsky, 1935 | gas phase; Heat of dissociation |
=
+
By formula: C2H4I2 = C2H4 + I2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 11.5 ± 0.2 | kcal/mol | Eqk | Benson and Amano, 1962 | gas phase |
IR Spectrum
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Data compiled by: Coblentz Society, Inc.
- SOLID (MINERAL OIL MULL); Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm-1 resolution
- SOLUTION (10% CCl4 FOR 5000-1330, 10% CS2 FOR 1330-625 CM-1); Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm-1 resolution
- SOLUTION (10% IN CCl4 FOR 3800-1340, AND 10% IN CS2 FOR 1340-450 CM-1); DOW KBr FOREPRISM-GRATING; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm-1 resolution
Gas Chromatography
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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
Kovats' RI, non-polar column, isothermal
| Column type | Active phase | Temperature (C) | I | Reference | Comment |
|---|---|---|---|---|---|
| Packed | OV-1 | 100. | 1002. | Castello and Gerbino, 1988 | He, Chromosorb W DMCS; Column length: 3. m |
| Packed | OV-1 | 125. | 1015. | Castello and Gerbino, 1988 | He, Chromosorb W DMCS; Column length: 3. m |
| Packed | OV-1 | 75. | 984. | Castello and Gerbino, 1988 | He, Chromosorb W DMCS; Column length: 3. m |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1008. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Carson, Laye, et al., 1994
Carson, A.S.; Laye, P.G.; Pedley, J.B.; Welsby, A.M.; Chickos, J.S.; Hosseini, S.,
The enthalpies of formation of iodoethane, 1,2-diiodoethane, 1,3-diiodopropane, and 1,4-diiodobutane,
J. Chem. Thermodyn., 1994, 26, 1103-1109. [all data]
Benson and Amano, 1962
Benson, S.W.; Amano, A.,
Thermodynamics of iodine addition to ethylene, propylene, and cyclopropane,
J. Chem. Phys., 1962, 36, 3464-3471. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Abrams and Davis, 1954
Abrams, A.; Davis, T.W.,
Use of radioactive iodine to determine equilibrium constants in ethylene-iodine-1,2-diiodoethane systems,
J. Am. Chem. Soc., 1954, 76, 5993-59. [all data]
Cutherbertson and Kistiakowsky, 1935
Cutherbertson, G.R.; Kistiakowsky, G.B.,
The thermal equilibrium between ethylene iodide, ethylene and iodine,
J. Chem. Phys., 1935, 3, 631-634. [all data]
Castello and Gerbino, 1988
Castello, G.; Gerbino, T.C.,
Effect of Temperature on the Gas Chromatographic Separation of Halogenated Compounds on Polar and Non-Polar Stationary Phases,
J. Chromatogr., 1988, 437, 33-45, https://doi.org/10.1016/S0021-9673(00)90369-8
. [all data]
Waggott and Davies, 1984
Waggott, A.; Davies, I.W.,
Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]
Notes
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- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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