Silicon tetrafluoride

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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

Fluorine anion + Silicon tetrafluoride = (Fluorine anion • Silicon tetrafluoride)

By formula: F- + F4Si = (F- • F4Si)

Quantity Value Units Method Reference Comment
Δr>121.8 ± 2.1kJ/molN/AKawamata, Neigishi, et al., 1996gas phase; B
Δr285. ± 21.kJ/molIMRBMurphy and Beauchamp, 1977gas phase; Fluoride Affinity: <BF3, >iPr2BF; B
Δr251. ± 17.kJ/molIMRELarson and McMahon, 1985gas 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
Quantity Value Units Method Reference Comment
Δr226. ± 17.kJ/molIMRELarson and McMahon, 1985gas 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
Δr210.kJ/molICRLarson and McMahon, 1984gas phase; switching reaction(F-)H2O, DG+-8. kJ/mol; 70 ARS/YAM; M

CN- + Silicon tetrafluoride = (CN- • Silicon tetrafluoride)

By formula: CN- + F4Si = (CN- • F4Si)

Quantity Value Units Method Reference Comment
Δr114. ± 4.2kJ/molIMRELarson, Szulejko, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Δr130.J/mol*KN/ALarson, Szulejko, et al., 1988gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M
Quantity Value Units Method Reference Comment
Δr76.6 ± 2.1kJ/molIMRELarson, Szulejko, et al., 1988gas phase; B,M

Chlorine anion + Silicon tetrafluoride = (Chlorine anion • Silicon tetrafluoride)

By formula: Cl- + F4Si = (Cl- • F4Si)

Quantity Value Units Method Reference Comment
Δr97.9 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr92.J/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction,Thermochemical ladder(Cl-)t-C4H9OH, Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Δr70.3 ± 8.4kJ/molIMRELarson and McMahon, 1985gas phase; B,M

C6H5NO2- + Silicon tetrafluoride = C6H5F4NO2Si-

By formula: C6H5NO2- + F4Si = C6H5F4NO2Si-

Quantity Value Units Method Reference Comment
Δr146. ± 8.4kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr64.9 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4FNO2- + Silicon tetrafluoride = C6H4F5NO2Si-

By formula: C6H4FNO2- + F4Si = C6H4F5NO2Si-

Quantity Value Units Method Reference Comment
Δr138. ± 8.4kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr58.2 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4ClNO2- + Silicon tetrafluoride = C6H4ClF4NO2Si-

By formula: C6H4ClNO2- + F4Si = C6H4ClF4NO2Si-

Quantity Value Units Method Reference Comment
Δr134. ± 8.4kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr50.2 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H7NO2- + Silicon tetrafluoride = C7H7F4NO2Si-

By formula: C7H7NO2- + F4Si = C7H7F4NO2Si-

Quantity Value Units Method Reference Comment
Δr146. ± 13.kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr65.3 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

p-Benzoquinone anion + Silicon tetrafluoride = C6H4F4O2Si-

By formula: C6H4O2- + F4Si = C6H4F4O2Si-

Quantity Value Units Method Reference Comment
Δr100. ± 8.4kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr55.2 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4N2O4- + Silicon tetrafluoride = C6H4F4N2O4Si-

By formula: C6H4N2O4- + F4Si = C6H4F4N2O4Si-

Quantity Value Units Method Reference Comment
Δr87.9 ± 4.2kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B
Quantity Value Units Method Reference Comment
Δr17.6 ± 2.5kJ/molTDAsWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

F5Si- + Silicon tetrafluoride = F9Si2-

By formula: F5Si- + F4Si = F9Si2-

Quantity Value Units Method Reference Comment
Δr40. ± 8.4kJ/molIMREHiraoka, Nasu, et al., 2000gas phase; B
Quantity Value Units Method Reference Comment
Δr21.5kJ/molIMREHiraoka, Nasu, et al., 2000gas phase; B

C6H4FNO2- + Silicon tetrafluoride = C6H4F5NO2Si-

By formula: C6H4FNO2- + F4Si = C6H4F5NO2Si-

Quantity Value Units Method Reference Comment
Δr52.3 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4ClNO2- + Silicon tetrafluoride = C6H4ClF4NO2Si-

By formula: C6H4ClNO2- + F4Si = C6H4ClF4NO2Si-

Quantity Value Units Method Reference Comment
Δr49.0 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4FNO2- + Silicon tetrafluoride = C6H4F5NO2Si-

By formula: C6H4FNO2- + F4Si = C6H4F5NO2Si-

Quantity Value Units Method Reference Comment
Δr52.3 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4ClNO2- + Silicon tetrafluoride = C6H4ClF4NO2Si-

By formula: C6H4ClNO2- + F4Si = C6H4ClF4NO2Si-

Quantity Value Units Method Reference Comment
Δr56.9 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H7NO2- + Silicon tetrafluoride = C7H7F4NO2Si-

By formula: C7H7NO2- + F4Si = C7H7F4NO2Si-

Quantity Value Units Method Reference Comment
Δr63.6 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H7NO2- + Silicon tetrafluoride = C7H7F4NO2Si-

By formula: C7H7NO2- + F4Si = C7H7F4NO2Si-

Quantity Value Units Method Reference Comment
Δr65.7 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4N2O4- + Silicon tetrafluoride = C6H4F4N2O4Si-

By formula: C6H4N2O4- + F4Si = C6H4F4N2O4Si-

Quantity Value Units Method Reference Comment
Δr30.1 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4N2O4- + Silicon tetrafluoride = C6H4F4N2O4Si-

By formula: C6H4N2O4- + F4Si = C6H4F4N2O4Si-

Quantity Value Units Method Reference Comment
Δr34.3 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4NO3- + Silicon tetrafluoride = C6H4F4NO3Si-

By formula: C6H4NO3- + F4Si = C6H4F4NO3Si-

Quantity Value Units Method Reference Comment
Δr57.3 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4BrNO2- + Silicon tetrafluoride = C6H4BrF4NO2Si-

By formula: C6H4BrNO2- + F4Si = C6H4BrF4NO2Si-

Quantity Value Units Method Reference Comment
Δr47.3 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4BrNO2- + Silicon tetrafluoride = C6H4BrF4NO2Si-

By formula: C6H4BrNO2- + F4Si = C6H4BrF4NO2Si-

Quantity Value Units Method Reference Comment
Δr49.0 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H4F3NO2- + Silicon tetrafluoride = C7H4F7NO2Si-

By formula: C7H4F3NO2- + F4Si = C7H4F7NO2Si-

Quantity Value Units Method Reference Comment
Δr44.4 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C10H7NO2- + Silicon tetrafluoride = C10H7F4NO2Si-

By formula: C10H7NO2- + F4Si = C10H7F4NO2Si-

Quantity Value Units Method Reference Comment
Δr42.7 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H4F3NO2- + Silicon tetrafluoride = C7H4F7NO2Si-

By formula: C7H4F3NO2- + F4Si = C7H4F7NO2Si-

Quantity Value Units Method Reference Comment
Δr40.2 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H4N2O2- + Silicon tetrafluoride = C7H4F4N2O2Si-

By formula: C7H4N2O2- + F4Si = C7H4F4N2O2Si-

Quantity Value Units Method Reference Comment
Δr38.5 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C8H3F6NO2- + Silicon tetrafluoride = C8H3F10NO2Si-

By formula: C8H3F6NO2- + F4Si = C8H3F10NO2Si-

Quantity Value Units Method Reference Comment
Δr30.5 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C8H9NO2- + Silicon tetrafluoride = C8H9F4NO2Si-

By formula: C8H9NO2- + F4Si = C8H9F4NO2Si-

Quantity Value Units Method Reference Comment
Δr82.8 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C13H10O- + Silicon tetrafluoride = C13H10F4OSi-

By formula: C13H10O- + F4Si = C13H10F4OSi-

Quantity Value Units Method Reference Comment
Δr92.0 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H4F3NO2- + Silicon tetrafluoride = C7H4F7NO2Si-

By formula: C7H4F3NO2- + F4Si = C7H4F7NO2Si-

Quantity Value Units Method Reference Comment
Δr45.6 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C6H4NO3- + Silicon tetrafluoride = C6H4F4NO3Si-

By formula: C6H4NO3- + F4Si = C6H4F4NO3Si-

Quantity Value Units Method Reference Comment
Δr58.2 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

C7H4N2O2- + Silicon tetrafluoride = C7H4F4N2O2Si-

By formula: C7H4N2O2- + F4Si = C7H4F4N2O2Si-

Quantity Value Units Method Reference Comment
Δr39.7 ± 2.5kJ/molIMREWilliamson, Knighton, et al., 2001gas phase; at 150 C; B

References

Go To: Top, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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]


Notes

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