iodine heptafluoride
- Formula: F7I
- Molecular weight: 259.89329
- IUPAC Standard InChIKey: PDJAZCSYYQODQF-UHFFFAOYSA-N
- CAS Registry Number: 16921-96-3
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Species with the same structure:
- Other names: Iodine fluoride
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Vibrational and/or electronic energy levels, 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 | -961.06 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1969 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 347.49 | J/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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
Temperature (K) | 298. to 6000. |
---|---|
A | 175.6460 |
B | 6.156714 |
C | -1.660890 |
D | 0.141340 |
E | -3.913220 |
F | -1026.816 |
G | 536.2758 |
H | -961.0648 |
Reference | Chase, 1998 |
Comment | Data last reviewed in December, 1969 |
Vibrational and/or electronic energy levels
Go To: Top, Gas 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: Takehiko Shimanouchi
Symmetry: D5h Symmetry Number σ = 10
Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
---|---|---|---|---|---|---|---|---|---|---|
Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
a1' | 1 | Ifax s-str | 676 | C | ia | 676 W p | gas | |||
a1' | 2 | Ifeq s-str | 635 | C | ia | 635 S p | gas | |||
a2 | 3 | IFax a-str | 672 | C | 672 VS | gas | ia | |||
a2 | 4 | FeqIFax deform | 257 | C | 257 W | gas | ia | |||
e1' | 5 | IFeq a-str | 746 | C | 746 S b | gas | ia | |||
e1' | 6 | FeqIFeq deform | 425 | C | 425 VS | gas | ia | |||
e1' | 7 | FaxIFax deform | 363 | C | 363 S | gas | ia | |||
e1 | 8 | FeqIFax deform | 310 | C | ia | 310 W dp | gas | |||
e2' | 9 | IFeq a-str | 510 | C | ia | 510 W dp | gas | |||
e2' | 10 | FeqIFeq deform | 352 | C | ia | 352 W dp | gas | |||
e2 | 11 | FeqIFax deform | 200 | D | ia | ia | CF. OC(ν2+ν11,ν5+ν11) | |||
Source: Shimanouchi, 1972
Notes
VS | Very strong |
S | Strong |
W | Weak |
ia | Inactive |
b | Broad |
p | Polarized |
dp | Depolarized |
OC | Frequency estimated from an overtone or a combination tone indicated in the parentheses. |
CF | Calculated frequency |
C | 3~6 cm-1 uncertainty |
D | 6~15 cm-1 uncertainty |
References
Go To: Top, Gas phase thermochemistry data, 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [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
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.