Magnesium iodide
- Formula: IMg
- Molecular weight: 151.2095
- CAS Registry Number: 14332-62-8
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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 | 5.882 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1974 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 60.385 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1974 |
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 | 8.905101 |
| B | 0.192933 |
| C | -0.031612 |
| D | 0.005543 |
| E | -0.027995 |
| F | 3.125600 |
| G | 70.94661 |
| H | 5.882890 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1974 |
Gas phase ion energetics data
Go To: Top, Gas phase 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 IMg+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.900 ± 0.040 | LPES | Miller and Lineberger, 1988 |
Constants of diatomic molecules
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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 March, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 26680 | 295 H | 0.5 | D → X | 26670 H | |||||||
| ↳Puri and Mohan, 1975 | ||||||||||||
| C | 26099 | 270 H | 0.72 | C → X | 26076 H | |||||||
| ↳Puri and Mohan, 1975 | ||||||||||||
| B | 25612 | 295 H | B ↔ X R | 25602 H | ||||||||
| ↳Morgan, 1936; Puri and Mohan, 1975 | ||||||||||||
| A | 24319 | 323 H | 1.0 | A ↔ X V | 24322 H | |||||||
| ↳Morgan, 1936; Puri and Mohan, 1975 | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| X (2Σ) | 0 | 316 H | 0.50 | |||||||||
Notes
| 1 | From an ill-defined threshold for dissociation photoionization, and from the heat of atomization of MgI2; using an assumed value for the ionization potential of MgI Berkowitz and Chupka, 1966. |
References
Go To: Top, Gas phase 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]
Miller and Lineberger, 1988
Miller, T.M.; Lineberger, W.C.,
Electron Affinity of Magnesium Chloride,
Chem. Phys. Lett., 1988, 146, 5, 364, https://doi.org/10.1016/0009-2614(88)87460-8
. [all data]
Puri and Mohan, 1975
Puri, S.N.; Mohan, H.,
Thermal emission spectrum of MgI,
Pramana, 1975, 4, 171. [all data]
Morgan, 1936
Morgan, F.,
Band spectra of MgCl, MgBr and MgI in absorption,
Phys. Rev., 1936, 50, 603. [all data]
Berkowitz and Chupka, 1966
Berkowitz, J.; Chupka, W.A.,
Photoionization of high-temperature vapors. I. The iodides of sodium, magnesium, and thallium,
J. Chem. Phys., 1966, 45, 1287. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, References
- 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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