I3 anion
- Formula: I3-
- Molecular weight: 380.71396
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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: John E. Bartmess
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -62.5 ± 2.4 | kcal/mol | R-EA | Taylor, Asmis, et al., 1999 | |
| ΔfH°gas | <-49.40 | kcal/mol | IMRB | Hogness and Harkness, 1928 | I2- + I2 -> First negative ion/molecule reaction reported. |
| ΔfH°gas | -115.20 | kcal/mol | Latt | Finch, Gates, et al., 1977 | This value is far more bound than expected from other studies |
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: John E. Bartmess
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
+
= I3-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 32.5 ± 2.4 | kcal/mol | N/A | Taylor, Asmis, et al., 1999 | gas phase |
| ΔrH° | 30.1 ± 1.4 | kcal/mol | CIDT | Do, Klein, et al., 1997 | gas phase |
| ΔrH° | 85.10 | kcal/mol | Ther | Finch, Gates, et al., 1977 | gas phase; This value is far more bound than expected from other studies |
| ΔrH° | 32.60 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; FeF3-(t); ; ΔS(EA)=2.8 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 22.50 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; FeF3-(t); ; ΔS(EA)=2.8 |
I3- + = (I3- •
)
By formula: I3- + I2 = (I3- • I2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 11.7 ± 1.4 | kcal/mol | CIDT | Do, Klein, et al., 1997 | gas phase |
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 by: John E. Bartmess
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 4.226 ± 0.013 | LPES | Taylor, Asmis, et al., 1999 | |
| 4.24999 | LPES | Zanni, Greenblatt, et al., 1999 | Stated electron affinity is the Vertical Detachment Energy |
| 4.347992 | N/A | Check, Faust, et al., 2001 | FeF3-(t); ; ΔS(EA)=2.8 |
References
Go To: Top, Gas phase thermochemistry 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.
Taylor, Asmis, et al., 1999
Taylor, T.R.; Asmis, K.R.; Zanni, M.T.; Neumark, D.M.,
Characterization of the I-3 radical by anion photoelectron spectroscopy,
J. Chem. Phys., 1999, 110, 16, 7607-7609, https://doi.org/10.1063/1.478672
. [all data]
Hogness and Harkness, 1928
Hogness, T.R.; Harkness, R.W.,
The Ionization Processes of Iodine Interpreted by the Mass Spectrograph,
Phys. Rev., 1928, 32, 5, 784, https://doi.org/10.1103/PhysRev.32.784
. [all data]
Finch, Gates, et al., 1977
Finch, A.; Gates, P.N.; Peake, S.J.,
Thermochemistry of polyhalides. III. Cesium and rubidium tetrachloroiodates,
J. Inorg. Nucl. Chem., 1977, 39, 2135. [all data]
Do, Klein, et al., 1997
Do, K.; Klein, T.P.; Pommerening, C.A.; Sunderlin, L.S.,
A New Flowing Afterglow-Guided Ion Beam Tandem Mass Spectrometer. Applications to the Thermochemistry of Polyiodide Ions,
J. Am. Soc. Mass Spectrom., 1997, 8, 7, 688, https://doi.org/10.1016/S1044-0305(97)00116-5
. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [all data]
Zanni, Greenblatt, et al., 1999
Zanni, M.T.; Greenblatt, B.J.; Davis, A.V.; Neumark, D.M.,
Photodissociation of gas phase I-3(-) using femtosecond photoelectron spectroscopy,
J. Chem. Phys., 1999, 111, 7, 2991-3003, https://doi.org/10.1063/1.479660
. [all data]
Notes
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- Symbols used in this document:
EAneutral Electron affinity of neutral species ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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