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, 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 | 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. - 1000. | 1000. - 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 |
Vibrational and/or electronic energy levels
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: 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, 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]
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, 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
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