mercury iodide
- Formula: HgI
- Molecular weight: 327.49
- IUPAC Standard InChI: InChI=1S/Hg.HI/h;1H/q+1;/p-1
- IUPAC Standard InChIKey: QKEOZZYXWAIQFO-UHFFFAOYSA-M
- CAS Registry Number: 7783-30-4
- Chemical structure:
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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 | 31.900 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1961 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 67.101 | 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 | 8.942020 |
| B | 0.601959 |
| C | -0.000056 |
| D | 0.000005 |
| E | -0.005225 |
| F | 29.18979 |
| G | 77.71370 |
| H | 31.90010 |
| 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 February, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H | 47110 | 97.1 H | 1.7 1 | H → X R | 47096 H | |||||||
| ↳Prileshajewa, 1932; missing citation | ||||||||||||
| G | 45542 | 88.4 H | 0.2 | G → X R | 45524 H | |||||||
| ↳Prileshajewa, 1932; missing citation | ||||||||||||
| F3 | (44531) | (85.5) H | (0.8) | F3 → X R | (44510) H | |||||||
| ↳Rao and Rao, 1946; Ramasastry, 1948 | ||||||||||||
| F2 2 | F2 → X R | |||||||||||
| ↳Rao and Rao, 1946; missing citation | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| F1 | 40152 | 90.8 H | 0.93 | F1 → X R | 40135 H | |||||||
| ↳Rao and Rao, 1946; Ramasastry, 1948 | ||||||||||||
| E 3 | E → X R | |||||||||||
| ↳Wieland, 1932; Sastry, 1942; Krishnamurthi, 1960 | ||||||||||||
| D (2Π3/2) | 36269 | 178.0 H | 1.14 | D → X V | 36295 H | |||||||
| ↳Wieland, 1932; Howell, 1944; Rao, Sastry, et al., 1944 | ||||||||||||
| C (2Π1/2) | 32730.0 | 235.6 H | 2.21 | C ↔ X V | 32785.0 H | |||||||
| ↳Wieland, 1929; Wieland, 1932; Howell, 1944; Rao, Sastry, et al., 1944; Wieland, 1948; Wieland and Herczog, 1949; Greig, Gunning, et al., 1970 | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| B 2Σ+ | 24187.1 | 110.45 H | 0.15 | B ↔ X R | 24180.0 H | |||||||
| ↳Wieland, 1948, 2; missing citation | ||||||||||||
| X 2Σ+ | 0 | 125.0 H | 1.0 4 | |||||||||
Notes
| 1 | Predissociation above v=2. |
| 2 | Unclassified bands in the region 40800 - 42200 cm-1, converging near 40800 cm-1. |
| 3 | Bands in the region 37500 - 39500 cm-1; tentative analyses Sastry, 1942, Krishnamurthi, 1960. |
| 4 | Above v=7: ωexe ~ 1.5. |
| 5 | Extrapolation for X 2Σ+ Wieland, 1960. Good agreement with an earlier thermochemical value Wieland and Herczog, 1949. |
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]
Prileshajewa, 1932
Prileshajewa, N.,
Uber den nachweis des jodatoms bei der optischen dissoziation von salzdampfen,
Phys. Z. Sowjetunion, 1932, 1, 189. [all data]
Rao and Rao, 1946
Rao, V.R.; Rao, K.R.,
Ultra violet band system of the mercury iodide molecule. Part II,
Indian J. Phys., 1946, 20, 148. [all data]
Ramasastry, 1948
Ramasastry, C.,
Ultra-violet bands of mercury iodide. Part IV,
Indian J. Phys., 1948, 22, 95. [all data]
Wieland, 1932
Wieland, K.,
Absorptions- und fluoreszenzspektren dampfformiger quecksilberhalogenide. I. HgJ2,
Z. Phys., 1932, 76, 801. [all data]
Sastry, 1942
Sastry, M.G.,
The ultra-violet band spectrum of mercury iodide,
Proc. Natl. Inst. Sci. India, 1942, 8, 289. [all data]
Krishnamurthi, 1960
Krishnamurthi, V.G.,
Ultra-violet bands of mercury iodide,
Z. Phys., 1960, 160, 438. [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]
Rao, Sastry, et al., 1944
Rao, K.R.; Sastry, M.G.; Krishnamurti, V.G.,
Ultra-violet band systems of the mercury iodide molecule. Part I,
Indian J. Phys., 1944, 18, 323. [all data]
Wieland, 1929
Wieland, K.,
Bandenspektren der quecksilber-, cadmium- und zinkhalogenide,
Helv. Phys. Acta, 1929, 2, 46. [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]
Wieland and Herczog, 1949
Wieland, K.; Herczog, A.,
114. Thermische dissoziation und thermodynamische eigenschaften von HgJ2 und HgJ in dampfphase,
Helv. Chim. Acta, 1949, 32, 889. [all data]
Greig, Gunning, et al., 1970
Greig, G.; Gunning, H.E.; Strausz, O.P.,
Reactions of metal atoms. III. The combination of mercury and iodine atoms and the spectrum of HgI,
J. Chem. Phys., 1970, 52, 4569. [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]
Wieland, 1960
Wieland, K.,
Bandensysteme B(2Σ+) → X(2Σ+) und Dissoziationswerte der Radikale HgJ und HgBr,
Z. Elektrochem., 1960, 64, 761. [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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