iodine pentafluoride
- Formula: F5I
- Molecular weight: 221.89649
- IUPAC Standard InChI: InChI=1S/F5I/c1-6(2,3,4)5
- IUPAC Standard InChIKey: PJIYEPACCBMRLZ-UHFFFAOYSA-N
- CAS Registry Number: 7783-66-6
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Phase change data, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -200.84 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1969 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 79.950 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1969 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 6000. |
|---|---|
| A | 30.70751 |
| B | 0.921841 |
| C | -0.248826 |
| D | 0.021183 |
| E | -0.581700 |
| F | -211.9850 |
| G | 113.5740 |
| H | -200.8400 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1969 |
Phase change data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 371. | K | N/A | PCR Inc., 1990 | BS |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 9.39 | 330. | Osborne, 1971 | Based on data from 283. to 378. K.; AC |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Phase change 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 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 |
|---|---|---|---|
| 12.943 ± 0.005 | PE | DeKock, Higginson, et al., 1972 | LLK |
| 13.5 ± 0.2 | EI | Irsa and Friedman, 1958 | RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| IF+ | ~24. | ? | EI | Irsa and Friedman, 1958 | RDSH |
| IF2+ | 15.1 ± 0.3 | ? | EI | Irsa and Friedman, 1958 | RDSH |
| IF3+ | 11.5 ± 0.3 | ? | EI | Irsa and Friedman, 1958 | RDSH |
| IF4+ | 13.6 ± 0.3 | F-? | EI | Irsa and Friedman, 1958 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Phase change 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
PCR Inc., 1990
PCR Inc.,
Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]
Osborne, 1971
Osborne, Darrell W.,
Calorimetric Study of Iodine Pentafluoride: Heat Capacity between 5 and 350°K, Enthalpy of Fusion and Vaporization, Standard Entropy of the Vapor, and Other Thermodynamic Properties,
J. Chem. Phys., 1971, 54, 9, 3790, https://doi.org/10.1063/1.1675430
. [all data]
DeKock, Higginson, et al., 1972
DeKock, R.L.; Higginson, B.R.; Lloyd, D.R.,
Photoelectron spectra of halides. Part 6.--The spectra of SF5Cl, BrF5 and IF5,
Faraday Discuss. Chem. Soc., 1972, 54, 84. [all data]
Irsa and Friedman, 1958
Irsa, A.P.; Friedman, L.,
Mass spectra of halogen fluorides,
J. Inorg. Nucl. Chem., 1958, 6, 77. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) Tboil Boiling point ΔfH°gas Enthalpy of formation of gas at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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