# niobium pentabromide

**Formula:**Br_{5}Nb**Molecular weight:**492.426**IUPAC Standard InChI:**- InChI=1S/5BrH.Nb/h5*1H;/p-1
- Download the identifier in a file.

**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**Information on this page:****Options:**

## 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 |
---|---|---|---|---|---|

_{f}H°_{gas} | -106.02 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{gas,1 bar} | 107.37 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |

### Gas Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) | 900. - 6000. |
---|---|

A | 31.72251 |

B | 0.063464 |

C | -0.017499 |

D | 0.001512 |

E | -0.149889 |

F | -115.9842 |

G | 144.9008 |

H | -106.0201 |

Reference | Chase, 1998 |

Comment | Data last reviewed in December, 1974 |

## Condensed 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 |
---|---|---|---|---|---|

_{f}H°_{liquid} | -130.27 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{liquid,1 bar} | 65.488 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |

Quantity | Value | Units | Method | Reference | Comment |

_{f}H°_{solid} | -132.90 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |

Quantity | Value | Units | Method | Reference | Comment |

S°_{solid} | 61.850 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |

### Liquid Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) | 527. - 900. |
---|---|

A | 47.26960 |

B | 38.75956 |

C | -76.69599 |

D | 26.59895 |

E | 0.243236 |

F | -145.6702 |

G | 112.5258 |

H | -130.2758 |

Reference | Chase, 1998 |

Comment | Data last reviewed in December, 1974 |

### Solid Phase Heat Capacity (Shomate Equation)

C_{p}° = A + B*t + C*t^{2} + D*t^{3} +
E/t^{2}

H° − H°_{298.15}= A*t + B*t^{2}/2 +
C*t^{3}/3 + D*t^{4}/4 − E/t + F − H

S° = A*ln(t) + B*t + C*t^{2}/2 + D*t^{3}/3 −
E/(2*t^{2}) + G

C_{p} = heat capacity (cal/mol*K)

H° = standard enthalpy (kcal/mol)

S° = standard entropy (cal/mol*K)

t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) | 298. - 527. |
---|---|

A | 35.35014 |

B | -0.001209 |

C | 0.002054 |

D | -0.001214 |

E | -0.000005 |

F | -143.4398 |

G | 104.6298 |

H | -132.9001 |

Reference | Chase, 1998 |

Comment | Data last reviewed in December, 1974 |

## Phase change 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:** William E. Acree, Jr., James S. Chickos

Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|

_{sub}H° | 27.5 ± 4.3 | kcal/mol | N/A | Türler, Eichler, et al., 1996 | Based on data from 298. - 479. K. |

## References

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**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

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- Symbols used in this document:

S° _{gas,1 bar}Entropy of gas at standard conditions (1 bar) S° _{liquid,1 bar}Entropy of liquid at standard conditions (1 bar) S° _{solid}Entropy of solid at standard conditions _{f}H°_{gas}Enthalpy of formation of gas at standard conditions _{f}H°_{liquid}Enthalpy of formation of liquid at standard conditions _{f}H°_{solid}Enthalpy of formation of solid at standard conditions _{sub}H°Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69:
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