Lead hydride
- Formula: HPb
- Molecular weight: 208.2
- CAS Registry Number: 14452-81-4
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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 | 56.451 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1962 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 52.763 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1962 |
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. - 1000. | 1000. - 6000. |
|---|---|---|
| A | 4.870741 | 7.031000 |
| B | 6.657642 | 1.454160 |
| C | -3.934690 | -0.183427 |
| D | 0.820152 | 0.007319 |
| E | 0.046070 | 0.183914 |
| F | 54.88979 | 54.42390 |
| G | 57.09849 | 60.76840 |
| H | 56.45010 | 56.45010 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1962 | Data last reviewed in June, 1962 |
Reaction 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.
Data compiled by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
Pb- + = HPb
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 347.5 ± 2.0 | kcal/mol | D-EA | Feigerle, Corderman, et al., 1981 | gas phase |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Constants of diatomic molecules, 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: John E. Bartmess
View reactions leading to HPb+ (ion structure unspecified)
De-protonation reactions
Pb- + = HPb
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 347.5 ± 2.0 | kcal/mol | D-EA | Feigerle, Corderman, et al., 1981 | gas phase |
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 May, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C (2Δ) 1 | C → X | 26205 | ||||||||||
| ↳Watson and Simon, 1940; Kleman, 1953 | ||||||||||||
| B | (18030) 2 | [478.8] 3 Z | [2.478] 3 4 | [2.604] | B → X R | 17498.7 3 Z | ||||||
| ↳Watson, 1938; Watson and Simon, 1940 | ||||||||||||
| A | (17590) | (500) 5 | (10) 5 | (3.025) 5 | (0.05) 5 | (2.36) | (A-X) | (17060) 5 | ||||
| X (2Π1/2) | 0 6 | 1564.1 Z | 29.75 | 4.971 | 0.144 | [201E-6] | 1.8388 | |||||
Notes
| 1 | Single weak band, not yet analyzed. |
| 2 | Watson, 1938, Watson and Simon, 1940 assumed this to be a 2Σ state; more recently, Kleman, 1953 suggested that the red system of PbH originates from a 4Σ-(1/2,3/2) upper state. |
| 3 | Strong perturbations; ΔG(3/2)= 448.1, ΔG(5/2)= 438.5, ΔG(7/2)= 432.6, ΔG(9/2)= 403: B1= 2.660, B2= 2.766, B3= 2.770, B4= 2.646 for low J values. Gero, 1940 has estimated the following "deperturbed" constants: ωe = 535 Gero, 1940, ωexe = 15 Gero, 1940; Be = 2.48 Gero, 1940, αe = 0.08 Gero, 1940, T0 = 17520 Gero, 1940. |
| 4 | Breaking off (predissociation) at N'=30,24,20 for v'=3,4,5, respectively Watson, 1938. The v=5, N=20 level lies at about 20610 cm-1 above the lowest ground state level. |
| 5 | All constants estimated from the perturbations in B Gero, 1940. |
| 6 | Originally believed to be 2Σ Watson, 1938, Watson and Simon, 1940, reassigned by Howell, 1945, Kleman, 1953. The 2Π3/2 component is expected at ~8000 cm-1 above 2Π1/2; the corresponding spectrum is in the infrared and not yet observed. |
| 7 | From the predissociation in B assuming dissociation at that limit into 3P1 + 2S. |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, 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]
Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Lineberger, W.C.,
Electron affinities of B, Al, Bi, and Pb,
J. Chem. Phys., 1981, 74, 2, 1513, https://doi.org/10.1063/1.441174
. [all data]
Watson and Simon, 1940
Watson, W.W.; Simon, R.,
Spectra of lead hydride and tin hydride in the near infra-red,
Phys. Rev., 1940, 57, 708. [all data]
Kleman, 1953
Kleman,
Thesis, Stockholm, 1953, 1. [all data]
Watson, 1938
Watson, W.W.,
The spectrum of lead hydride,
Phys. Rev., 1938, 54, 1068. [all data]
Gero, 1940
Gero, L.,
Zur vervollstandigung des termschemas von bleihydrid,
Z. Phys., 1940, 116, 379. [all data]
Howell, 1945
Howell, H.G.,
The spectra of tin and lead hydrides,
Proc. Phys. Soc. London, 1945, 57, 37. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, 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 ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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