Disilicon mononitride
- Formula: NSi2
- Molecular weight: 70.1777
- CAS Registry Number: 12293-67-3
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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 | 397.48 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 256.48 | J/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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 1000. | 1000. - 6000. |
|---|---|---|
| A | 40.52978 | 62.14412 |
| B | 54.41501 | 0.212812 |
| C | -52.38535 | -0.098632 |
| D | 18.08860 | 0.016640 |
| E | -0.239935 | -1.890290 |
| F | 382.5996 | 373.5241 |
| G | 290.1273 | 323.3835 |
| H | 397.4804 | 397.4804 |
| 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, Vibrational and/or electronic energy levels, 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 |
Vibrational and/or electronic energy levels
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: Marilyn E. Jacox
State: 2Su+
| Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
|---|---|---|---|---|---|---|---|
| To = 34314.29 | gas | 2Su+-X | 275 | 315 | Brugh and Morse, 1997 | ||
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| Σu+ | 3 | Asym. stretch | 904.0 | Ar | IR | Meloni, Nunziante Cesaro, et al., 2001 | |
| 3 | Asym. stretch | 910.0 | N2 | IR | Meloni, Nunziante Cesaro, et al., 2001 | ||
Additional references: Jacox, 1998, page 174; Jacox, 2003, page 101
Notes
| o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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]
Brugh and Morse, 1997
Brugh, D.J.; Morse, M.D.,
Resonant two-photon ionization spectroscopy of the 13-electron triatomic Si2N,
Chem. Phys. Lett., 1997, 267, 3-4, 370, https://doi.org/10.1016/S0009-2614(97)00108-5
. [all data]
Meloni, Nunziante Cesaro, et al., 2001
Meloni, G.; Nunziante Cesaro, S.; Sanna, N.,
FTIR matrix isolation and ab initio investigations of the Si2N and BNSi molecules,
Chem. Phys. Lett., 2001, 343, 1-2, 113, https://doi.org/10.1016/S0009-2614(01)00663-7
. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.