mercury chloride
- Formula: ClHg
- Molecular weight: 236.04
- CAS Registry Number: 7546-30-7
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Gas phase thermochemistry data
Go To: Top, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 18.75 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1961 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 62.141 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1961 |
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. to 6000. |
|---|---|
| A | 8.930459 |
| B | 0.204314 |
| C | -0.002795 |
| D | 0.000240 |
| E | -0.025665 |
| F | 15.99230 |
| G | 72.74431 |
| H | 18.75000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1961 |
Constants of diatomic molecules
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: Klaus P. Huber and Gerhard H. Herzberg
Data collected through January, 1975
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D (2Π3/2) | 39703.5 | 341.8 HQ | 1.87 | D ↔ X V | 39727.7 HQ | |||||||
| ↳Wieland, 1929; missing citation; missing citation; missing citation | ||||||||||||
| C (2Π1/2) | (35782) | (383) 1 | C ↔ X (V) | 35828 | ||||||||
| ↳Wieland, 1929; Wieland, 1932; missing citation; missing citation; Wieland, 1941; Howell, 1944; Wieland, 1948; Krishnamurthy, 1958; missing citation | ||||||||||||
| B 2Σ+ | 23421.0 | 192.0 2 H | 0.50 2 | B → X RV | 23371.0 H | |||||||
| ↳Wieland, 1929; Wieland, 1932; missing citation; missing citation; Wieland, 1948, 2 | ||||||||||||
| X 2Σ+ | 0 | 292.61 H | 1.6025 3 | [(2.23)] 4 | ||||||||
Notes
| 1 | From the absorption spectrum Horne, Gosavi, et al., 1968. |
| 2 | For v ≥ 30: ωe = 186.2, ωexe = 0.40. |
| 3 | ωeze = -0.000033. All constants refer to R heads of B-X. From Q heads of D-X ωe = 293.4, ωexe = 1.82. |
| 4 | From electron diffraction data Maxwell and Mosley, 1940; according to Wieland, 1941 more likely corresponding to the Hg-Cl separation in HgCl2 than in HgCl. |
References
Go To: Top, Gas phase thermochemistry 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]
Wieland, 1929
Wieland, K.,
Bandenspektren der quecksilber-, cadmium- und zinkhalogenide,
Helv. Phys. Acta, 1929, 2, 46. [all data]
Wieland, 1932
Wieland, K.,
Absorptions- und fluoreszenzspektren dampfformiger quecksilberhalogenide. II. HgBr2 und HgCl2,
Z. Phys., 1932, 77, 157. [all data]
Wieland, 1941
Wieland, K.,
Das langwellige emissions- und fluoreszenzspektrum (λλ 5700-3000 ÅE.) von naturlichem HgCl und von kunstlich angereichertem HgCl37,
Helv. Phys. Acta, 1941, 14, 420. [all data]
Howell, 1944
Howell, H.G.,
The ultra-violet spectra and electron configuration of HgF and related halide molecules,
Proc. R. Soc. London A, 1944, 182, 95. [all data]
Wieland, 1948
Wieland, K.,
Spectres d'absorption des halogenures de mercure (HgX2) en equilibre thermique au-dessus de 1000°C,
J. Chim. Phys. Phys.-Chim. Biol., 1948, 45, 3. [all data]
Krishnamurthy, 1958
Krishnamurthy, V.G.,
Ultra-violet bands of mercury chloride,
Z. Phys., 1958, 150, 287. [all data]
Wieland, 1948, 2
Wieland, K.,
Molekulspektren mit Ionencharakter und ihre Beeinflussung durch Fremdgase
in Contribution a l'Etude de la Structure Moleculaire, Desoer, Liege, ed(s)., 1948, 229-238. [all data]
Horne, Gosavi, et al., 1968
Horne, D.G.; Gosavi, R.; Strausz, O.P.,
Reactions of metal atoms. I. The combination of mercury and chlorine atoms and the dimerization of HgCl,
J. Chem. Phys., 1968, 48, 4758. [all data]
Maxwell and Mosley, 1940
Maxwell, L.R.; Mosley, V.M.,
Internuclear distances in Se2, Te2, and HgCl by electron diffraction,
Phys. Rev., 1940, 57, 21. [all data]
Notes
Go To: Top, Gas phase thermochemistry 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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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