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Dibromosilylene


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
Deltafgas-12.50kcal/molReviewChase, 1998Data last reviewed in December, 1977
Quantity Value Units Method Reference Comment
gas,1 bar72.942cal/mol*KReviewChase, 1998Data last reviewed in December, 1977

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. - 6000.
A 13.91660
B -0.027115
C -0.006987
D 0.007117
E -0.099080
F -16.98070
G 89.23470
H -12.50000
ReferenceChase, 1998
Comment Data last reviewed in December, 1977

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:   A ?


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

Tx = 27600 gas A-X 340 400 Ruzsicska, Jodhan, et al., 1987

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 1 Sym. stretch 402.6 s Ar IR Maass, Hauge, et al., 1972
b2 3 Asym. stretch 399.5 vs Ar IR Maass, Hauge, et al., 1972

Additional references: Jacox, 1994, page 101

Notes

sStrong
vsVery strong
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.

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]

Ruzsicska, Jodhan, et al., 1987
Ruzsicska, B.; Jodhan, A.; Safarik, I.; Strausz, O.P.; Bell, T.N., Flash photolysis of SiBr4: the UV spectrum of SiBr2, Chem. Phys. Lett., 1987, 139, 1, 72, https://doi.org/10.1016/0009-2614(87)80153-7 . [all data]

Maass, Hauge, et al., 1972
Maass, G.; Hauge, R.H.; Margrave, J.L., The I.R. Spectra of Matrix-isolated SiBr2 and SiCl2, Z. Anorg. Allg. Chem., 1972, 392, 3, 295, https://doi.org/10.1002/zaac.19723920314 . [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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