Disilicon carbide
- Formula: CSi2
- Molecular weight: 68.1817
- CAS Registry Number: 12070-04-1
- Information on this page:
- Other data available:
- Options:
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 | 535.55 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1966 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 242.29 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1966 |
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. to 1200. | 1200. to 6000. |
|---|---|---|
| A | 38.96220 | 62.75874 |
| B | 41.84126 | -7.005439 |
| C | -29.86230 | 4.097706 |
| D | 7.853285 | -0.425546 |
| E | -0.139347 | 0.696590 |
| F | 521.8578 | 513.9207 |
| G | 277.4360 | 312.3410 |
| H | 535.5520 | 535.5520 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1966 | Data last reviewed in March, 1966 |
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: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a1 | 1 | Sym. stretch | 839.5 | Ar | IR | Presilla-Marquez and Graham, 1991 | |
| 2 | Bend | 166.4 | T | Ar | IR | Presilla-Marquez and Graham, 1991 | |
| b2 | 3 | Asym. stretch | 1188.4 | s | Ar | IR | Kafafi, Hauge, et al., 1983 Presilla-Marquez and Graham, 1991 |
Additional references: Jacox, 1994, page 67
Notes
| s | Strong |
| T | Tentative assignment or approximate value |
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]
Presilla-Marquez and Graham, 1991
Presilla-Marquez, J.D.; Graham, W.R.M.,
Fourier transform vibrational spectroscopy of Si2C in solid Ar,
J. Chem. Phys., 1991, 95, 8, 5612, https://doi.org/10.1063/1.461636
. [all data]
Kafafi, Hauge, et al., 1983
Kafafi, Z.H.; Hauge, R.H.; Fredin, L.; Margrave, J.L.,
Infrared matrix isolation spectrum of the disilicon carbide (Si2C) molecule,
J. Phys. Chem., 1983, 87, 5, 797, https://doi.org/10.1021/j100228a020
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [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
- 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.