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Disilicon carbide


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
Deltafgas535.55kJ/molReviewChase, 1998Data last reviewed in March, 1966
Quantity Value Units Method Reference Comment
gas,1 bar242.29J/mol*KReviewChase, 1998Data 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.

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Temperature (K) 298. - 1200.1200. - 6000.
A 38.9622062.75874
B 41.84126-7.005439
C -29.862304.097706
D 7.853285-0.425546
E -0.1393470.696590
F 521.8578513.9207
G 277.4360312.3410
H 535.5520535.5520
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1966 Data last reviewed in March, 1966

Gas phase ion energetics 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.

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
9.0 ± 0.5EIStearns and Kohl, 1973LLK
9.5 ± 0.5EIGuido and Gigli, 1973LLK
9.1EIVerhaegen, Stafford, et al., 1964RDSH
9.2 ± 0.3EIDrowart, DeMaria, et al., 1958RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Si2+~15.CEIAuwera-Mahieu, Peeters, et al., 1970RDSH

Vibrational and/or electronic energy levels

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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

sStrong
TTentative assignment or approximate value

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]

Stearns and Kohl, 1973
Stearns, C.A.; Kohl, F.J., Mass spectrometric determination of the dissociation energies of gaseous Al2, AlSi, and AlSiO, High Temp. Sci., 1973, 5, 113. [all data]

Guido and Gigli, 1973
Guido, M.; Gigli, G., Mass spectrometric study of the CeSiC molecules, J. Chem. Phys., 1973, 59, 3437. [all data]

Verhaegen, Stafford, et al., 1964
Verhaegen, G.; Stafford, F.E.; Drowart, J., Mass spectrometric study of the systems boron-carbon and boron-carbon-silicon, J. Chem. Phys., 1964, 40, 1622. [all data]

Drowart, DeMaria, et al., 1958
Drowart, J.; DeMaria, G.; Inghram, M.G., Thermodynamic study of SiC utilizing a mass spectrometer, J. Chem. Phys., 1958, 29, 1015. [all data]

Auwera-Mahieu, Peeters, et al., 1970
Auwera-Mahieu, A.V.; Peeters, R.; McIntyre, N.S.; Drowart, J., Mass spectrometric determination of dissociation energies of the borides and suicides of some transition metals, J. Chem. Soc. Faraday Trans., 1970, 66, 809. [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

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