Difluorooxosilane


Ion clustering 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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Clustering reactions

Fluorine anion + Difluorooxosilane = (Fluorine anion • Difluorooxosilane)

By formula: F- + F2OSi = (F- • F2OSi)

Quantity Value Units Method Reference Comment
Δr123.40kcal/molTherDamrauer, Simon, et al., 1991gas phase; Between HCO2H, HCl; B
Δr102. ± 17.kcal/molIMRBLarson and McMahon, 1987gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

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 Si=O stretch 1309 vs Ar IR Schnockel, 1980
2 SiF s-stretch 835 m Ar IR Schnockel, 1980
3 SiF2 deform. 423 w m Ar IR Schnockel, 1980
b1 4 OPLA 344 s Ar IR Schnockel, 1980
b2 5 SiF a-stretch 996 s Ar IR Schnockel, 1980
6 SiF2 rock 333 m Ar IR Schnockel, 1980

Additional references: Jacox, 1994, page 211

Notes

wWeak
mMedium
sStrong
vsVery strong

References

Go To: Top, Ion clustering 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.

Damrauer, Simon, et al., 1991
Damrauer, R.; Simon, R.; Krempp, M., Effect of Substituents on the Gas-Phase Acidity of Silanols, J. Am. Chem. Soc., 1991, 113, 12, 4431, https://doi.org/10.1021/ja00012a009 . [all data]

Larson and McMahon, 1987
Larson, J.W.; McMahon, T.B., Trends in Gas Phase Fluoride Ion Affinities of the Main Group Oxyfluorides and Fluoride Sulfides. Fluoride Adducts of FAsO, FPO, FPO2, F2SiO, F4SO, FBO, F2SiS, FPS, FAsS, F2S2, and S2O., Inorg. Chem., 1987, 26, 24, 4018, https://doi.org/10.1021/ic00271a011 . [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Schnockel, 1980
Schnockel, H., Matrixreaktion von SiO mit F2. IR-spektroskopischer nachweis von molekularem OSiF2, J. Mol. Struct., 1980, 65, 115, https://doi.org/10.1016/0022-2860(80)85184-2 . [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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