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Trifluorosilyl radical


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, 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
Deltafgas-259.400kcal/molReviewChase, 1998Data last reviewed in December, 1977
Quantity Value Units Method Reference Comment
gas,1 bar67.488cal/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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View table.

Temperature (K) 298. - 1100.1100. - 6000.
A 10.1330019.77130
B 23.261900.059820
C -21.23790-0.013095
D 6.8982800.001000
E -0.099375-0.857380
F -263.6150-267.7610
G 73.1401187.64981
H -259.4001-259.4001
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1977 Data last reviewed in December, 1977

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, 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.

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess

View reactions leading to F3Si+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
2.41 ± 0.22LPESKawamata, Neigishi, et al., 1996Vertical Detachment Energy: 2.76±0.05 eV.; B
2.95 ± 0.10PDRichardson, Stephenson, et al., 1975non-adiabatic; B
2.03811EIAEFranklin, Wang, et al., 1974From SiF4; B
2.03811EIAEWang, Margrave, et al., 1973From SiF4; B
3.69996EIAEMacNeil and Thynne, 1970From SiF4; B
3.35205SIPage and Goode, 1969The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV) Method Reference Comment
9.99 ± 0.24ENDWeber and Armentrout, 1988LL

Vibrational and/or electronic energy levels

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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:   ?


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

gas 290 340 Suto, Han, et al., 1989
Biehl, Boyle, et al., 1997

State:   ?


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

gas 350 800 Donnelly and Flamm, 1980
Suto, Han, et al., 1989
Vanhaelemeersch, Van Hoeymissen, et al., 1991
Biehl, Boyle, et al., 1997

State:   X


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

a1 1 SiF stretch 834.9 Ne IR Jacox, Irikura, et al., 1995
1 SiF stretch 832 s Ar IR Milligan, Jacox, et al., 1968
2 Umbrella 406 s Ar IR Milligan, Jacox, et al., 1968
e 3 SiF stretch 958.6 Ne IR Jacox, Irikura, et al., 1995
3 SiF stretch 954 vs Ar IR Milligan, Jacox, et al., 1968
4 Deformation 290 w m Ar IR Milligan, Jacox, et al., 1968

Additional references: Jacox, 1994, page 218; Jacox, 1998, page 262; Jacox, 2003, page 241; Wang, Krishnan, et al., 1973; Griffith and Mathews, 1997; Tanimoto and Saito, 1999

Notes

wWeak
mMedium
sStrong
vsVery strong

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]

Kawamata, Neigishi, et al., 1996
Kawamata, H.; Neigishi, Y.; Kishi, R.; Iwata, S.; Nakajima, A.; Kaya, K., Photoelectron Spectroscopy of Silicon-Fluorine Binary Cluster Anions (SinFm-), J. Chem. Phys., 1996, 105, 13, 5369, https://doi.org/10.1063/1.472377 . [all data]

Richardson, Stephenson, et al., 1975
Richardson, J.H.; Stephenson, L.M.; Brauman, J.I., Photodetachment of electrons from trifluoromethyl and trifluorosilyl ions the electron affinities of CF3 and SiF3, Chem. Phys. Lett., 1975, 30, 17. [all data]

Franklin, Wang, et al., 1974
Franklin, J.L.; Wang, J.L.-F.; Bennett, S.L.; Harland, P.W.; Margrave, J.L., Studies of the energies of negative ions at high temperatures, Adv. Mass Spectrom., 1974, 6, 319. [all data]

Wang, Margrave, et al., 1973
Wang, J.L.-F.; Margrave, J.L.; Franklin, J.L., Interpretation of dissociative electron attachment processes for carbon and silicon tetrafluorides, J. Chem. Phys., 1973, 58, 5417. [all data]

MacNeil and Thynne, 1970
MacNeil, K.A.G.; Thynne, J.C.J., The Formation of Negative Ions by Electron Impact on Silicon Tetrafluoride and Carbon Tetrafluoride, Int. J. Mass Spectrom. Ion Phys., 1970, 3, 6, 455, https://doi.org/10.1016/0020-7381(70)80004-3 . [all data]

Page and Goode, 1969
Page, F.M.; Goode, G.C., Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]

Weber and Armentrout, 1988
Weber, M.E.; Armentrout, P.B., Energetics and dynamics in the reaction of Si+ with SiF4. Thermochemistry of SiFx and SiFx+ (x=1,2,3), J. Chem. Phys., 1988, 11, 6898. [all data]

Suto, Han, et al., 1989
Suto, M.; Han, J.C.; Lee, L.C.; Chuang, T.J., Emission spectra of SiF3, J. Chem. Phys., 1989, 90, 5, 2834, https://doi.org/10.1063/1.455935 . [all data]

Biehl, Boyle, et al., 1997
Biehl, H.; Boyle, K.J.; Seccombe, D.P.; Smith, D.M.; Tuckett, R.P.; Yoxall, K.R.; Baumgartel, H.; Jochims, H.W., Vacuum-UV fluorescence spectroscopy of SiF[sub 4] in the range 10--30 eV, J. Chem. Phys., 1997, 107, 3, 720, https://doi.org/10.1063/1.474437 . [all data]

Donnelly and Flamm, 1980
Donnelly, V.M.; Flamm, D.L., Studies of chemiluminescence accompanying fluorine atom etching of silicon, J. Appl. Phys., 1980, 51, 10, 5273, https://doi.org/10.1063/1.327282 . [all data]

Vanhaelemeersch, Van Hoeymissen, et al., 1991
Vanhaelemeersch, S.; Van Hoeymissen, J.; Vermeylen, D.; Peeters, J., SiF2 as a primary desorption product of Si etching by F atoms: Interpretation of laser-induced fluorescence spectra; rate constant of the gas phase SiF2+F reaction, J. Appl. Phys., 1991, 70, 7, 3892, https://doi.org/10.1063/1.349197 . [all data]

Jacox, Irikura, et al., 1995
Jacox, M.E.; Irikura, K.K.; Thompson, W.E., Matrix isolation study of the interaction of excited neon atoms with SiF4: Infrared spectra of SiF+3 and SiF-3, J. Chem. Phys., 1995, 103, 13, 5308, https://doi.org/10.1063/1.470726 . [all data]

Milligan, Jacox, et al., 1968
Milligan, D.E.; Jacox, M.E.; Guillory, W.A., Matrix-Isolation Study of the Vacuum-Ultraviolet Photolysis of Trifluorosilane. The Infrared Spectrum of the Free Radical SiF3, J. Chem. Phys., 1968, 49, 12, 5330, https://doi.org/10.1063/1.1670052 . [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]

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]

Wang, Krishnan, et al., 1973
Wang, J.L.-F.; Krishnan, C.N.; Margrave, J.L., Emission spectrum of SiF3, J. Mol. Spectrosc., 1973, 48, 2, 346, https://doi.org/10.1016/0022-2852(73)90199-9 . [all data]

Griffith and Mathews, 1997
Griffith, W.B., Jr.; Mathews, C.W., private communication., 1997, https://doi.org/10.1016/S1090-9516(97)90007-9 . [all data]

Tanimoto and Saito, 1999
Tanimoto, M.; Saito, S., Microwave spectroscopic study of the SiF[sub 3] radical: Spin-rotation interaction and molecular structure, J. Chem. Phys., 1999, 111, 20, 9242, https://doi.org/10.1063/1.479838 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References