Disilicon mononitride
- Formula: NSi2
- Molecular weight: 70.1777
- CAS Registry Number: 12293-67-3
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Gas phase thermochemistry data
Go To: Top, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 95.000 | kcal/mol | Review | Chase, 1998 | Data last reviewed in March, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 61.300 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1967 |
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 1000. | 1000. to 6000. |
|---|---|---|
| A | 9.686850 | 14.85280 |
| B | 13.00550 | 0.050863 |
| C | -12.52040 | -0.023574 |
| D | 4.323280 | 0.003977 |
| E | -0.057346 | -0.451790 |
| F | 91.44350 | 89.27440 |
| G | 69.34209 | 77.29051 |
| H | 95.00010 | 95.00010 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1967 | Data last reviewed in March, 1967 |
Gas phase ion energetics data
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 as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.3 ± 0.5 | EI | Muenow, 1974 | LLK |
| 9.5 ± 0.5 | EI | Muenow, 1973 | LLK |
| 9.4 ± 0.3 | EI | Zmbov and Margrave, 1967 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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]
Muenow, 1974
Muenow, D.W.,
Mass spectrometric determination of the heats of formation and atomization energies of the molecules Ge2N and GeSiN,
J. Chem. Phys., 1974, 60, 3382. [all data]
Muenow, 1973
Muenow, D.W.,
Mass spectrometric evidence for the gaseous silicon oxide nitride molecule and its heat of atomizaton,
J. Phys. Chem., 1973, 77, 970. [all data]
Zmbov and Margrave, 1967
Zmbov, K.F.; Margrave, J.L.,
Mass spectrometric evidence for the gaseous Si2N molecule,
J. Am. Chem. Soc., 1967, 89, 2492. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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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