Silicon tetrafluoride

• Formula: F₄Si
• Molecular weight: 104.0791
• IUPAC Standard InChI: InChI=1S/F4Si/c1-5(2,3)4 Copy

  
• IUPAC Standard InChIKey: ABTOQLMXBSRXSM-UHFFFAOYSA-N Copy
• CAS Registry Number: 7783-61-1
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Silane, tetrafluoro-; Silicon fluoride (SiF4); Tetrafluorosilane; SiF4; Silicon fluoride; UN 1859
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
• Data at other public NIST sites:
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = 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.

Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Enthalpy of sublimation

Reaction 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.

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

 +  = ( • )

By formula: F^- + F₄Si = (F^- • F₄Si)

CN^- +  = (CN^- • )

By formula: CN^- + F₄Si = (CN^- • F₄Si)

 +  = ( • )

By formula: Cl^- + F₄Si = (Cl^- • F₄Si)

C₆H₅NO₂^- +  = C₆H₅F₄NO₂Si^-

By formula: C₆H₅NO₂^- + F₄Si = C₆H₅F₄NO₂Si^-

C₆H₄FNO₂^- +  = C₆H₄F₅NO₂Si^-

By formula: C₆H₄FNO₂^- + F₄Si = C₆H₄F₅NO₂Si^-

C₆H₄ClNO₂^- +  = C₆H₄ClF₄NO₂Si^-

By formula: C₆H₄ClNO₂^- + F₄Si = C₆H₄ClF₄NO₂Si^-

C₇H₇NO₂^- +  = C₇H₇F₄NO₂Si^-

By formula: C₇H₇NO₂^- + F₄Si = C₇H₇F₄NO₂Si^-

 +  = C₆H₄F₄O₂Si^-

By formula: C₆H₄O₂^- + F₄Si = C₆H₄F₄O₂Si^-

C₆H₄N₂O₄^- +  = C₆H₄F₄N₂O₄Si^-

By formula: C₆H₄N₂O₄^- + F₄Si = C₆H₄F₄N₂O₄Si^-

F₅Si^- +  = F₉Si₂^-

By formula: F₅Si^- + F₄Si = F₉Si₂^-

C₆H₄FNO₂^- +  = C₆H₄F₅NO₂Si^-

By formula: C₆H₄FNO₂^- + F₄Si = C₆H₄F₅NO₂Si^-

C₆H₄ClNO₂^- +  = C₆H₄ClF₄NO₂Si^-

By formula: C₆H₄ClNO₂^- + F₄Si = C₆H₄ClF₄NO₂Si^-

C₆H₄FNO₂^- +  = C₆H₄F₅NO₂Si^-

By formula: C₆H₄FNO₂^- + F₄Si = C₆H₄F₅NO₂Si^-

C₆H₄ClNO₂^- +  = C₆H₄ClF₄NO₂Si^-

By formula: C₆H₄ClNO₂^- + F₄Si = C₆H₄ClF₄NO₂Si^-

C₇H₇NO₂^- +  = C₇H₇F₄NO₂Si^-

By formula: C₇H₇NO₂^- + F₄Si = C₇H₇F₄NO₂Si^-

C₇H₇NO₂^- +  = C₇H₇F₄NO₂Si^-

By formula: C₇H₇NO₂^- + F₄Si = C₇H₇F₄NO₂Si^-

C₆H₄N₂O₄^- +  = C₆H₄F₄N₂O₄Si^-

By formula: C₆H₄N₂O₄^- + F₄Si = C₆H₄F₄N₂O₄Si^-

C₆H₄N₂O₄^- +  = C₆H₄F₄N₂O₄Si^-

By formula: C₆H₄N₂O₄^- + F₄Si = C₆H₄F₄N₂O₄Si^-

C₆H₄NO₃^- +  = C₆H₄F₄NO₃Si^-

By formula: C₆H₄NO₃^- + F₄Si = C₆H₄F₄NO₃Si^-

C₆H₄BrNO₂^- +  = C₆H₄BrF₄NO₂Si^-

By formula: C₆H₄BrNO₂^- + F₄Si = C₆H₄BrF₄NO₂Si^-

C₆H₄BrNO₂^- +  = C₆H₄BrF₄NO₂Si^-

By formula: C₆H₄BrNO₂^- + F₄Si = C₆H₄BrF₄NO₂Si^-

C₇H₄F₃NO₂^- +  = C₇H₄F₇NO₂Si^-

By formula: C₇H₄F₃NO₂^- + F₄Si = C₇H₄F₇NO₂Si^-

C₁₀H₇NO₂^- +  = C₁₀H₇F₄NO₂Si^-

By formula: C₁₀H₇NO₂^- + F₄Si = C₁₀H₇F₄NO₂Si^-

C₇H₄F₃NO₂^- +  = C₇H₄F₇NO₂Si^-

By formula: C₇H₄F₃NO₂^- + F₄Si = C₇H₄F₇NO₂Si^-

C₇H₄N₂O₂^- +  = C₇H₄F₄N₂O₂Si^-

By formula: C₇H₄N₂O₂^- + F₄Si = C₇H₄F₄N₂O₂Si^-

C₈H₃F₆NO₂^- +  = C₈H₃F₁₀NO₂Si^-

By formula: C₈H₃F₆NO₂^- + F₄Si = C₈H₃F₁₀NO₂Si^-

C₈H₉NO₂^- +  = C₈H₉F₄NO₂Si^-

By formula: C₈H₉NO₂^- + F₄Si = C₈H₉F₄NO₂Si^-

C₁₃H₁₀O^- +  = C₁₃H₁₀F₄OSi^-

By formula: C₁₃H₁₀O^- + F₄Si = C₁₃H₁₀F₄OSi^-

C₇H₄F₃NO₂^- +  = C₇H₄F₇NO₂Si^-

By formula: C₇H₄F₃NO₂^- + F₄Si = C₇H₄F₇NO₂Si^-

C₆H₄NO₃^- +  = C₆H₄F₄NO₃Si^-

By formula: C₆H₄NO₃^- + F₄Si = C₆H₄F₄NO₃Si^-

C₇H₄N₂O₂^- +  = C₇H₄F₄N₂O₂Si^-

By formula: C₇H₄N₂O₂^- + F₄Si = C₇H₄F₄N₂O₂Si^-

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• GAS (490 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY; 2 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

• gas

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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: Takehiko Shimanouchi

Symmetry:   T_d     Symmetry Number σ = 12

Source: Shimanouchi, 1972

Notes

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), 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.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

PCR Inc., 1990
PCR Inc., Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]

Booth and Swinehart, 1935
Booth, H.S.; Swinehart, C.F., Critical Constants and Vapor Pressure of Some Gaseous Fluorides of Group IV, J. Am. Chem. Soc., 1935, 57, 1337. [all data]

Pace and Mosser, 1963
Pace, E.L.; Mosser, J.S., Thermodynamic Properties of Silicon Tetrafluoride from 15 ºK to its Triple Point. The Entropy from Molecular and Spectroscopic Data, J. Chem. Phys., 1963, 39, 1, 154-158, https://doi.org/10.1063/1.1733993 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Patnode and Papish, 1929
Patnode, W.I.; Papish, Jacob, The Vapor Pressure of Silicon Tetrafluoride, J. Phys. Chem., 1929, 34, 7, 1494-1496, https://doi.org/10.1021/j150313a010 . [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]

Murphy and Beauchamp, 1977
Murphy, M.K.; Beauchamp, J.L., Methyl and Fluorine Substituent Effects on the Gas Phase Lewis Acidities of Silanes by ICR Spectroscopy, J. Am. Chem. Soc., 1977, 99, 15, 4992, https://doi.org/10.1021/ja00457a017 . [all data]

Larson and McMahon, 1985
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of the main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ICR halide exchange equilibria, J. Am. Chem. Soc., 1985, 107, 766. [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]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ion cyclotron resonance halide-exchange equilibria, J. Phys. Chem., 1984, 88, 1083. [all data]

Larson, Szulejko, et al., 1988
Larson, J.W.; Szulejko, J.E.; McMahon, T.B., Gas Phase Lewis Acid-Base Interactions. An Experimental Determination of Cyanide Binding Energies From Ion Cyclotron Resonance and High-Pressure Mass Spectrometric Equilibrium Measurements., J. Am. Chem. Soc., 1988, 110, 23, 7604, https://doi.org/10.1021/ja00231a004 . [all data]

Payzant, Yamdagni, et al., 1971
Payzant, J.D.; Yamdagni, R.; Kebarle, P., Hydration of CN-, NO₂-, NO₃-, and HO- in the gas phase, Can. J. Chem., 1971, 49, 3308. [all data]

Williamson, Knighton, et al., 2001
Williamson, D.H.; Knighton, W.B.; Grimsrud, E.P., Lewis acid-base interactions of SiF4 with molecular anions formed by electron capture reactions, Int. J. Mass Spectrom., 2001, 206, 1-2, 53-61, https://doi.org/10.1016/S1387-3806(00)00388-2 . [all data]

Hiraoka, Nasu, et al., 2000
Hiraoka, K.; Nasu, M.; Minamitsu, A.; Shimizu, A.; Yamabe, S., On the structure and stability of gas-phase cluster ions SiF3+(CO)(n), SiF3OH2+(SiF4)(n), SiF4H+(SiF4)(n), and F- (SiF4)(n), J. Phys. Chem. A, 2000, 104, 36, 8353-8359, https://doi.org/10.1021/jp000525d . [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]

Notes

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• Symbols used in this document:
  

  Pc	Critical pressure
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tboil	Boiling point
  Tc	Critical temperature
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔsubH	Enthalpy of sublimation

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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