Lead bromide
- Formula: BrPb
- Molecular weight: 287.1
- CAS Registry Number: 15576-47-3
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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 | 70.92 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 272.51 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1973 |
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) | 298. - 6000. |
|---|---|
| A | 37.27249 |
| B | 0.049732 |
| C | 0.651152 |
| D | -0.073741 |
| E | -0.030162 |
| F | 59.70526 |
| G | 317.4037 |
| H | 70.92298 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
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
View reactions leading to BrPb+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.90 ± 0.20 | EIAE | Hastie, Bloom, et al., 1967 | From PbBr2 |
| 0.766419 | N/A | Check, Faust, et al., 2001 | MnC3-(t); ; ΔS(EA)=2.1 |
Constants of diatomic molecules
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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: Klaus P. Huber and Gerhard H. Herzberg
Data collected through July, 1977
| Symbol | Meaning |
|---|---|
| State | electronic state and / or symmetry symbol |
| Te | minimum electronic energy (cm-1) |
| ωe | vibrational constant – first term (cm-1) |
| ωexe | vibrational constant – second term (cm-1) |
| ωeye | vibrational constant – third term (cm-1) |
| Be | rotational constant in equilibrium position (cm-1) |
| αe | rotational constant – first term (cm-1) |
| γe | rotation-vibration interaction constant (cm-1) |
| De | centrifugal distortion constant (cm-1) |
| βe | rotational constant – first term, centrifugal force (cm-1) |
| re | internuclear distance (Å) |
| Trans. | observed transition(s) corresponding to electronic state |
| ν00 | position of 0-0 band (units noted in table) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B (2Σ) | 34523.7 | 258.2 H | 0.60 1 | B ← X1 V | 34549.0 H | |||||||
| ↳missing citation | ||||||||||||
| A (1/2) | 20884.3 | 152.5 H | 0.40 | -0.028 | 2 | A ↔ X1 R | 20856.8 H | |||||
| ↳Morgan, 1936; Pannetier and Deschamps, 1965; Singh, 1968 | ||||||||||||
| X1 2Π1/2 | 0 | 207.5 H | 0.50 | -0.07 | 2 | |||||||
Notes
| 1 | Diffuse bands (Prediss.) |
| 2 | Tentative rotational analysis Lal and Khanna, 1968. |
| 3 | See Wieland and Newburgh, 1952 for a discussion of this value. |
| 4 | Electron impact study of PbBr2 Hastie, Bloom, et al., 1967, 2; the same authors give 0.9 eV for the electron affinity of PbBr. |
| 5 | ωexe = 0.52 Pannetier and Deschamps, 1965, ωeye = +0.0023 Pannetier and Deschamps, 1965. Similar constants in Singh, 1968. |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, NIST Free Links, 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]
Hastie, Bloom, et al., 1967
Hastie, J.W.; Bloom, H.; Morrison, J.D.,
Electron Impact Studies of PbCl2, PbBr2, and PbBrCl,
J. Chem. Phys., 1967, 47, 5, 158, https://doi.org/10.1063/1.1712136
. [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]
Morgan, 1936
Morgan, F.,
Absorption spectra of PbF, PbCl and PbBr,
Phys. Rev., 1936, 49, 47. [all data]
Pannetier and Deschamps, 1965
Pannetier, G.; Deschamps, P.,
Le spectre du monobromure de plomb en emission,
C.R. Acad. Sci. Paris, 1965, 261, 3109. [all data]
Singh, 1968
Singh, S.P.,
Emission spectrum of PbBr molecule,
Indian J. Pure Appl. Phys., 1968, 6, 384. [all data]
Lal and Khanna, 1968
Lal, K.M.; Khanna, B.N.,
A note on the rotational analysis of the A-X system of the PbBr molecule,
Can. J. Phys., 1968, 46, 1991. [all data]
Wieland and Newburgh, 1952
Wieland, K.; Newburgh, R.,
Uber einige neue Bandenspektren der Radikale PbCl, PbBr und PbJ,
Helv. Phys. Acta, 1952, 25, 87. [all data]
Hastie, Bloom, et al., 1967, 2
Hastie, J.W.; Bloom, H.; Morrison, J.D.,
Electronimpact studies of PbCl2, PbBr2, and PbClBr,
J. Chem. Phys., 1967, 47, 1580. [all data]
Notes
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- Symbols used in this document:
EA Electron affinity 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
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