niobium pentabromide
- Formula: Br5Nb
- Molecular weight: 492.426
- IUPAC Standard InChI: InChI=1S/5BrH.Nb/h5*1H;/p-1
- IUPAC Standard InChIKey: ITWCCCHTECIZSS-UHFFFAOYSA-M
- CAS Registry Number: 13478-45-0
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Niobium(V) pentabromide
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- Other data available:
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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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -443.59 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 449.25 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |
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.
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| Temperature (K) | 900. to 6000. |
|---|---|
| A | 132.7270 |
| B | 0.265533 |
| C | -0.073214 |
| D | 0.006324 |
| E | -0.627136 |
| F | -485.2780 |
| G | 606.2650 |
| H | -443.5880 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1974 |
Phase change data
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: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 115. ± 18. | kJ/mol | N/A | Türler, Eichler, et al., 1996 | Based on data from 298. to 479. K. |
References
Go To: Top, Gas phase thermochemistry data, Phase change 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]
Türler, Eichler, et al., 1996
Türler, A.; Eichler, B.; Jost, D.T.; Piguet, D.; Gäggeler, H.W.; Gregorich, K.E.; Kadkhodayan, B.; Kreek, S.A.; Lee, D.M.; Mohar, M.; Sylwester, E.; Hoffman, D.C.; Hübener, S.,
On-line Gas Phase Chromatography with Chlorides of Niobium and Hahnium (Element 105),
Radiochimca Acta, 1996, 73, 2, 55-66, https://doi.org/10.1524/ract.1996.73.2.55
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, 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 ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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